Gm gear ratio codes. Close ratio gearing lets us work both the torque and rpm side of this equation for big gains in HP and performance. 87 x 3. 73 RATIO. Current setup - 3. Jason Larochelle. No more arguments about what gear ratios were available with which ring gear sizes! I typed this in straight from a scan of GM's part catalogs. 20:1 in the Corvettes, initially, and added the 2. Depending on the gear ratio, My son with the 4. Does that sound about right? « Last Edit: September 03, 2007, 03:14:52 PM by 81Cheyenne » 6. The choice of transmission was dictated by the engine size and rear-axle ratio. If there are other transmission codes, repair those problems first before proceeding with an incorrect gear ratio code. 64:1 and 2. G80 -- AXLE REAR, HD locking differential GM does not put a limited slip in trucks with the exception of the Quadrasteer whick could have a G86 limited slip. 88 ratio 29-24-20-18 fits corvette '80-'85 (1304077017) gear - speedometer drive: d44: painted exterior below-eye-line mirrors: d45: stainless steel exterior below-eye-line mirrors: d73: pickup box side rails: e5z: less adapter-speedometer: e62: body equipment,stepside pickup box: e63: body equipment,fleetside pickup box: e81: wood floor fleetside pickup box: e7b: sleeve - speedometer gear: e9z . The sticker containing the information you need will be on your trunk lid when you open it up. If you go up to Richmond gear Catalog - Super T10 , it will show their version of these transmissions. 625 inches, whereas the 8. Divide the 41 by the 11, this gives you a 3. K30 - Speed & Cruise Control. From 1980 through today, they now have 17 digits. Starting around 1969 Saginaw started ink stamping a two letter code on the side cover and/or the aluminum end plug. 08:1 Positraction 4-Speed CX 3. The TH200-4R transmission has a 2. P0730 OLDSMOBILE Incorrect Gear Ratio. However, a "B" in the axle code (i. 05 GM had built a couple different set ups for the rear end. 42: 2. All 67-74 Muncies carry a producion code number stamped vertically on right side of case beginning with "P". 55's and an Eaton posi in a 57 (stronger than the 55 and 56) center section, in a 55 housing. 42:1 ratio included on many Canyon V-6 and Sierra 1500 models offers a good all-around blend. 10 Rear Axle Gear Ratio. 3. 61 low ratio and reverse gear synchronization. Only the main gear option would appear (such as GU4 or GU5 . 90:1 & up. 0 to 2. There are 164 different RPO codes, so the dealer, service facility or a reference book will be needed to . 00 The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. 93. Before this point a cable-drive speedometer was used, while afterwards the DRAC was incorporated into the speedometer itself, then later the vehicle computer . We have also seen the codes stamped upside down. 43:1 first "S" close ratio, 3 rings=2. Gear ratio determined as gear position which TCM supposes Hoping the spindles and rear axle are still on it. Gear ratio: 1/3 to 1/60 For medium loads: Model GM-LJP Service factor: 1. Trying to figure out what this rear end came from, know it's a gm 10 bolt and not sure what gear ratio. In this example (Figure 3), GT4 is the axle ratio code. 10 rear, or myself with the 3. Hoping the spindles and rear axle are still on it. Also removes the USB port and auxiliary power outlet when (AZ3) bench seat is ordered. EDB30174. The standard (250HP) with a TurboHydra-Matic, has a 2. The speed limitation is operating as designed. Trimatic ID Plate. The number of ring gear teeth and pinion gear teeth are stamped into the outside of the ring gear. Tech Resources Browse All Articles, Guides & Videos . A numerically higher ratio will cause the same tire travel but at higher RPM. 23 ratio made 1st gear impossible to select. 1963-1964 Code Ratio Type CA 3. 73 (diff ratio) = 3032 (driveshaft rpm) x . This picture shown the oem Final gear ratio, we replaced the differential ratio from 2. . MT-2500. GT5 -- AXLE REAR, 4. 90 rear axle gear ratio as an example [2. 73 diff ratio: 813 (tire revs per mile) x 3. 73 but then today on kbb. Axle Ratios or Axle Codes. 10, 4. 33 RATIO. From 1964 through 1970 the format for the rear axle information consisted of a 2-letter code for the ratio, a 4-digit number for the month/year, and a single letter for the rear axle assembly plant. You can find it in: 73-96 C20, C2573-00 C30, C3573-00 G30, G3573-00 K20, K2573-00 K30, K3584-88 CUCV. Serial numbers from 1963 to 1966 included only the month and day. 89 with MT: 3780270: 3783095 DA (1961 AM) BY: 3. D = Day shift N = Night shift 1 = Day shift 2 = Night shift - = No positraction D = Dana . The TH200-4R was primarily used in GM rear wheel drive cars that were equipped with the 231 Buick, 301 Pontiac, and the Oldsmobile 307, 350 gas and diesel engines between 1981 and 1990. 42:1 ratio will cause the same tire travel but at higher RPM than a 2. The gear ratios were changed in the 4T65, the power rating was upgraded, and the electronic controls were improved. The 8L90/8L45 transmissions utilize five clutches to provide eight forward . The 8. Traditional BOMs are 6 digits followed by 1 or 2 digits, and start with the numbers 60 or 61. The 25/21tooth headset ratio is 1. Transmissions & Oversized Tires: How Changing Gear Ratios Helps Prevent Drivetrain Damage. GM Specific Codes. While the parts catalog says " The third digit of the axle . This all new power steering box has a quick 12. 1st Gear Ratio: 2. HO4 - 4. Maximum (Max) road speed: 78 mph. G51 - Rear Extra Capacity Springs. P0731 Code - Gear 1 Incorrect Ratio - Code Popularity: 92,809 Views - Repair Importance Level: 3/3 . Hydraulics Fundamentals Part VII: AFL/Solenoid Modulator Valves. Most auto repairs shops charge between $75 and $150 per hour. GU5 AXLE REAR,3. This form is used to submit missing RPO Codes and request changes to the RPO Code Table on Corvette Salvage. 20x10 Fuel Nutz,37/12. 5-inch is often referred to as the "GM corporate 10-bolt" because of its multiple uses, and the 8. 62; 3rd gear: 1; 4th gear: 0. 89 with PG : 3780272* 3795640 TA (1961 AM) 1962 Differentials - All 3. 921:1: 2nd Gear Ratio: 1. e. 10 Ratio GU4 Rear Axle: 3. 19:1 and the 29/24 ratio is 1. First locate your current gear ratio and tire diameter and then find your approximate RPM at 65 MPH, then reference your new tire diameter with your desired RPM to find the new gear ratio needed. Brakes & Suspension AT 4. Rear axle RPO 005, 4. 36 x 2. Lastly, lets get one thing correct here. The two letter code was used at the GM assembly plants to keep different part number gears separate. 0 Output range: 3-phase, 0. Differential Gear Ratio. History Based on fact, rumors, internet stories, and my vague memory. 29 JZFM 258mm R115 YesIMS. HC2 - 2. Enjoy. Sonnax Transmission parts for GM 5L50-E applications. 23:1 ratio as well as the 2. Ok, the 11:41 is the gear ratio. 7 to 55 kW Gear ratio: 1/5 to 1/240 For uniform loads to heavy loads Service factor: 1. 42: GU6 3. 10 when i put 35 on. The most common place to find it is near the dashboard or on a sticker on the driver’s side door jamb. 10 ratio. Just above the steering wheel, you’d find an embedded plate in the dashboard made of metal. You will see all the RPO codes there. 56 Rear Axle Gear Ratio. 5E med-duty 4-pinion. It looks like a bunch of goobildy ****, but each 3 digit code means something and will tell you everything about your truck. 1. 11 X 2180) per minute to maintain that speed. 64:1 first "W" wide ratio, and 6 rings=3. The 12-bolt was used in many vehicles . The rear sometimes has a tag on back cover. 76 Rear Axle Gear Ratio. Available Gear Ratios. If the TCM detects an incorrect 1st gear ratio while decelerating in LOW (L), indicating no engine braking within the transmission, then DTC P0730 sets. In our example, the intermediate gear ratios are 20/7 = 2. 36 rear axle gear ratio would be more livable [3. For instance, the 3. but you can check the RPO codes in the glove box. GT5 Rear Axle: 4:10 Ratio. Divide number of teeth on ring gear by teeth on pinion for ratio. 11, the driveshaft must turn 8,959 times (4. BL: 3. 06; 2nd gear: 1. With this information, I would say you have the original axle and gears. The last GM model to use this transmission was the 2011 Chevrolet Impala . 00: Z-code: 3. Cars meant for acceleration have lower gears, usually something numerically above 3. 4. GM NP261 Transfer Case. 08:1 to 3. The very large HT letters define this as being from an LH, HQ or HJ Holden. Muncie 4-speeds were produced in two different ratios wide-ratio (M-20) and close-ratio (M-21). DTC P0730 is a type A DTC. 202 (3. There should be some rings on the input gear like the Muncie: 2 rings=2. Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. 67 (4th gear OD ratio) = 2031 rpm @ 60 mph 3. gear - speedometer drive: d44: painted exterior below-eye-line mirrors: d45: stainless steel exterior below-eye-line mirrors: d73: pickup box side rails: e5z: less adapter-speedometer: e62: body equipment,stepside pickup box: e63: body equipment,fleetside pickup box: e81: wood floor fleetside pickup box: e7b: sleeve - speedometer gear: e9z . VIN Breakdown Method. Information revealed in the VIN numbers is general, but each VIN is assigned uniquely to each truck. June 27, 2019. This quick ratio power steering gear box is a great upgrade to replace the Saginaw/Delphi 800 series found in most 1965 and up GM muscle cars. 375-inch right-hand thread bolts in the ring gear. The code would be stamped on the plate, and you . oldsgmail. 43:1 ratio in both their aluminum and cast-iron cased versions. It wasn't until late 1972 that the 10 bolt 8. Check the RPO codes on the sticker in your glove box: GT4 AXLE REAR,3. For instance, if both the engine and transmission deliver up to 100 ft. As well as a whole lot more cab and chasis trucks, delivery vans, etc. P0730 NISSAN Belt Damage. GM input shafts protrude their usual 6-5/8" while the Dodge . 89:1 ratio Code Application Carrier Differential assembly (DA) and/or Transaxle assembly (TA) HE: MT: 3826196 . LPO, Performance Air Intake System. The BOM will identify the model number, the gear ratio, the type of axle / differential, and component parts. For example: A Chevy 1/2 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. 1958-1970 Chevy Rear Differential code Identification. 00: 1. Torque output comes in quicker with large cubic inch street and mild engines, while limiting high rpm horsepower. The numbers should let you know what gear-ratio came from the factory, the date of production, where the unit was assembled, and whether the carrier is Positraction or not (see charts). 12 bolt. April 20, 2020. 2-inch differentials use . The all-new Allison 10-speed 10L1000 automatic transmission (RPO MGM, MGU) available on 2020 Silverado HD and Sierra HD models equipped with the 6. I currently have a bid in myself on a 1977 GM Factory Wiring Manual. 00: AA-code: 3. Hydraulics Fundamentals Part VIII: Check Valves. 88-91. #3 · Feb 15, 2008. You have a sticker inside the glove box with your truck's RPO codes. Calculating the torque multiplication that your axle gears provide is quite easy. It tended to be used mostly by Trans Am road racers and was also sold by Moroso as their "Brute Strength" carrier. just wondering if anybody knows the axles gear ratio my truck has, its stock gears and ratio, can't really find it anywhere, i thought i saw somewhere that said 3. 11:1 Continue reading → In early years GM seems to have switched and swapped transmissions as necessary to obtain the total torque multiplication desired, rather than re-gear transmissions for individual applications. 9 and 30/20 = 1. If the actual gear position is higher than the position (5th) supposed by TCM, the slip ratio will be more than normal. If we drop the gear ratio to 3:1, however, the driveshaft only has to spin at 6150RPM. low gear ratio error: 87: high gear ratio error: For GM OBD2 Codes, . 77: 1. 42/13. super t10 transmission cluster shaft by richmond gear 2. By decoding the Vehicle Identification Number (VIN), you can also find out what axle ratio your truck has. Ratio Distance. The differential with a 3. To help you find the right part, we first need to properly identify the axle you have or need. DUP (duplicated) means there's another code (5X1) that was also used for 3. So instead of having to keep the engine straining at almost 9000 . The 10-bolt, 8. 346 . GM's goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. RATIO CODE 5. ”. 3) 6 Cyl with 4. The F Calibration relates to the Band tightening requirement. BODY EQUIPMENT,INCREASED LENGTH (18 IN) E73. 568:1: 3rd Gear Ratio . 2004 4T65-E ID Chart. 69 Successor. 2015 CCLB duramax 7. It could be a 10- or 12-bolt. With a gear ratio of 4. The choices are 3. It will have a bunch of 3 digit codes called RPO codes. The one variable with the 708 gearbox is that it came with two different sector shafts. The input shaft for the 1992 Dodge NV4500 was 19 splines with a 1" diameter, like its predecessor, the Dodge NP435. 75: 1. GM 4L80-E, 4L85-E, TH400 Valve Body Layout. Jump to: Driveshaft | decoding | ring gear identification | Speedo-gears Camaro Rear Axle Information The 1970 rear end differs from the 1971-1981 rear end. GU6 -- AXLE REAR, 3. 84. 4L80E Code (DTC) P1721 Gear 1 Incorrect Ratio; 4L80E Code (DTC) P1722 Gear 2 Incorrect Ratio; 4L80E Code (DTC) P1723 Gear 3 incorrect Ratio; 4L80E Code (DTC) P1724 Gear 4 Incorrect Ratio; 4L80E Code (DTC) P1725 Insufficient Engine Speed Increase During Self Test; 4L80E Code (DTC) P1726 Insufficient Engine Speed Decrease During Self Test Torque converter slip ratio = A x C/B. 91: 1. 73 Ratio. If you plan to fix P0733 yourself, our brief discussion about OBD codes and gear ratios can help you come up with a proper solution. 0 : Cylinder Unit, For Single Key System 6. The digits between these numbers represent the gear ratio. 70:1 Positraction 4-Speed CE 4. 21:1. P0730 TOYOTA Incorrect Gear Ratio. 5 V30. 70:1 Standard Manual Transmission AN 3. 13 gear ratios (GM part numbers 3961192 and 3961195). GM OBD1 Codes; 13: O2 sensor or circuit: 14: coolant sensor/high temp: 15: . If the rear end has an Eaton Positraction unit, there may also be a single letter "E" to note this. Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled “Service Parts Identification . 67-72 RPO Codes. For example, Chevy trucks from 1972-1979 only had 13 digits. 10 RATIO (DUP WITH GTS) GT7 AXLE REAR,3. Limited span between higher gears increases sustainability during highway driving, especially when in the final gear. 5/20, Nfab Cts2 with turbo timer, and pyro, FASS 150 titanium, Fab Four bumpers, Cree lights, Custom strobes with wireless controller, Flo-Pro stainless 5 . 45 x 2 ÷ 25. 42 ratio MYC Transmission, 6-speed automatic M5U Transmission, 8-speed automatic. The history of the ST-10 transmission begins with the Borg Warner T-85 3-speed which was the basis for the Borg Warner T-10 4-speed first used by GM in 1957. Ratio Code Chart. That code has nothing to do with your gear ratio. 73 awhile back so i thought it was 3. General Motors has a wide range of front and rear ends! We carry everything from the 7. 4BCB 3400 Buick, Pontiac B platform 3. jc8825 said: 3. K22 - 94 Amp Alternator. 5-inch is a semi-float axle, meaning it has only one . 0. You didn’t identify the number of bolts on the cover. I won the bid for $17. GM FWD Torque Converters GM uses the same type 4-digit ID method of identifying FWD torque converters as with the RWD units, however the digits have different meanings. GT4 is the 3. The RPO code located in the glove compartment or in the trunk on most GM vehicles is needed to identify the type of rear end. 5 10-bolt axles. BODY -P20-P920-P30-P930. In 1971, GM instituted a standardized "corporate" rear axle. 11:1 Positraction Manual Transmission AQ 4. 6" IRS (218mm, AAM) - Late Model Camaro V8 GM 8. June 08, 2020. B: Engine speed signal from Engine Control Module (ECM) C: Gear ratio determined as gear position which TCM supposes. 11 37=gear ratio 3. 28: 1. 5" RCX lift. The NP261 is chain driven, 4WD with manual shift. Incorrect ratio codes typically require an advanced mechanical ability and diagnostic tools. 1973-81 Rear Differential - GM 12 Bolt with 8-7/8" Ring Gear and 30 Spline Pinion. GU4 AXLE REAR,3. MISC. 00: X-code: 2. 66=year. 49. GT8 AXLE REAR,4. FW. GM RPO Codes Below is a complete listing of the General Motors Regular Production Option (RPO) Codes. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. 73 gears, but they no longer use it Turn wheel in air one complete turn while counting the number of times the pinion turns. 23: 1. Rear Axle Assembly Codes. How to choose the correct Ring & Pinion: Each ring and pinion gear set sold below is for replacement use only. I have also listed a helpful gear to tire size chart to help people better understand. GM RPO Codes: RPO Code: Description: Ratio: F16: Transaxle Final Drive: 2. 5 to 1/60 For uniform loads 1974 A and G Body Rear Axle ID. BODY -P20-P920-P25-P30-P930. 23. General Motors OBD-II Trouble Codes. GM Transmission Identification: Tri-Matic. Cars with RPO GU5 have 1st gear, because their 3. In general, the intermediate gear ratios of a gear train will multiply together to equal the overall gear ratio. Rear spring mounting pads differed in that 1964-66 rear ends used a flat pad with a hole drilled in the center. Using a 3. 375: 1. 4CAB 3800 / 3800SC Chevy, Pontiac W platform 3. In order for a NASCAR car to go 180 MPH, the tires have to rotate at 2180 RPM. 43: 1. SM420 4spd: This was and still is considered by many 4wheelers as GM's best cast iron granny gear trans, although it is not well known, and not as common as the Sm465 is. 327" And here's a formula that you can use to calculate your vehicle's rear axle gear ratio: RING GEAR TOOTH COUNT ÷ PINION GEAR TOOTH COUNT = GEAR RATIO. 89. 19], this is on the high side for a high torque engine. GM RPO Codes, or General Motors “Regular Production Option” codes contain lots of valuable . 74: 1. 23 Ratio. CLICK HERE TO CHECK IT OUT. 12. Symptoms. GM CORPORATE 14-BOLT With a 10 1/2-inch-diameter ring gear, the biggest 14-bolt GM rearend looks much like a Dana 70, and is but a few thousandths of an inch shorter in ring gear diameter. K34 - Electronic Speed Control 1963-1964 Code Ratio Type CA 3. by RPO code (sticker on door/glovebox/purchase sheet): GU5 Rear Axle: 3. Ratios of the M20, M21, M22. 88: 1. i have a 96 gmc 4x4 in which a 6. The 350 w/300HP (RPO L48) Turbo H-M came with 2. 00: Y-code: 2. GQ1 -- AXLE REAR, STD RATIO. 12:1, the output torque is 412 ft. GT4 Rear axle, 3. 73: GT4 or GS3 or H05 4. Note that neither of these are equal to the gear ratio for the entire train, 4. 72 to 1. Details. Or have the run you vin no. 54:1 ratio and a 2. 61: 1. 08: GU4 3. 75. 56:1 Positraction Manual Transmission AS 3. The two most common codes in the CTS are GU5 (3. Special heat treated R-50 High Impact ring and pinion sets were available in the 4. Of course, if your limited slip diff has failed, the open diff is less prone to failure, so keeping the gear ratio and going without might . 07 Rear Axle Gear Ratio. Sometimes it is sometimes on the dashboard above the steering wheel. The 1964 serial numbers are found on the bottom of the . After this, the 4T65-E transmission was phased out in favor of its successor, the new a 6T70 transmission family. The 10 bolt Chevelle rear end has the 8. The 2019 Silverado 4500HD/5500HD/6500HD Speed and axle ratios are: Rear axle RPO 066, 4. It is controlled by the number of teeth on the ring vs. The 4L60E is the electronically commanded evolution of the Turbo-Hydramatic 700R4, originally produced in 1982. Acknowledgements Successor. I bet the farm you will find the G80/GT4 though. A ratio of 4. 53: F17: Transaxle . This rear end was available in a 10 bolt version only. 17: 2. 4BCB 3400 U-van Chevy, Pontiac 3. Here are some more specifics: P0730: Incorrect Gear Ratio; P0731: Gear 1 Incorrect ratio; P0732: Gear 2 Incorrect ratio; P0733: Gear 3 Incorrect ratio; P0734: Gear 4 Incorrect ratio 1974 A and G Body Rear Axle ID. Rear Axle – 3. ”) “M” and “N” were used to identify 3-speed Muncies; “O” identifies the Saginaw 3-speed with overdrive. 00: CC-code: 2. 42:1). However, note also that (20/7) × (30/20) = 4. (CROSS SECTION WIDTH x 0. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963 . The rear axle ratio may be determined by finding the two- or three-letter serial number prefix in the following table. On some tags, the first 2 digits won't . 5Y1. 70:1 Positraction Manual Trans. P0730 MAZDA Incorrect Gear Ratio. 10. 73 ratio GU4 Rear axle, 3. 875" / 32 Pinion Diameter / Spline: 1. However, that's not really true for the front axle, as discussed below. 36:1 Standard Powerglide AH 3. For 67 12-bolts, the radius rod bracket shifts the axle stamp outboard a little, as shown in the other picture. 100 x 4. Most recently, I picked up a GM 1982 Light Duty Truck Factory Service Manual, which includes a full wiring diagram. 43:1 ratios. 87 = 9. The older manuals didn't include wiring. Symptoms of a P0730 trouble code may include: The 8L90 can be identified by the following RPO codes, M5Q, M5X and new for 2019, MQE while the 8L45 is identified by the RPO codes, M5T, M5N. (example: P7A14 - Muncie 1967, Jan 14) Muncies assembly codes are model year. Also look for the G80 code, which indicates a limited slip differential. 56 ratio. 42 Ratio G80 Rear Axle: Locking axle. The rings originally corresponded with rings or grooves on the counter gear so that the assembler matched a one or two ring input with a one or two . 625 . 29 35/35 3. Ditto i have 3. The 3817778 is the bill of materials code numbers (I think - not very positive). P1871 Undefined Gear Ratio That means you’ve either got the M20 Wide-Ratio, M21 Close-Ratio, or the M22 Close-Ratio heavy-duty four-speed Muncie. Why? Because the speed was too high for a 3. BODY EQUIPMENT,INCREASED WIDTH (9 IN) Keep in mind that incorrect ratio codes typically require advanced mechanical ability and diagnostic tools. . RPO codes and build information. You said '70 model C10 4x4'. gm#552746, 13-40 GM K code-GAH K 111 2 differential- GM 8 K ? 8" GM canada Gm#=14030352 Thanks for any help, steven m The GM Corporate 14-bolt axle is one of the most favored rear-ends you can find used for under $500. Axle ratios of 3. If the RPO codes are still in the glove box you can check them. For example: 32. P1134 HO2S Transition Time Ratio Bank 1 Sensor 1 . Seats, Driver and passenger front individual seatsDriver and passenger front individual seats derived from a 40-20-40 split bench seat with the 20% section removed. 73 RATIO (DUP WITH 5X1) GT5 AXLE REAR,4. 64: 1. 08 ratio GU5 Rear axle, 3. 11 Rear Axle Gear Ratio. It looks like this: This is a STOCK ring and pinion from a 1966 12 bolt pickup ring gear. 2" ring gear from 1964 to early 1972. com it said 3. 25" IFS front end parts, to the large 11. 00: V-code: 2. Ring Gear Bolts: (10) 7/16"x20 RH Ring Gear Bolts: (10) 7/16"x20 LH Cover Bolts: 12 Cover Bolts: 10 Carrier Breaks: Carrier Breaks: 2. 7:1 ratio with firm modern steering feel. 30 ratio. P0730 VOLKSWAGEN Incorrect Gear Ratio. You can safely put 3 series gears in a 4 series carrier with a custom machined spacer but not vice-versa. Chrysler used both a 2. This can usually be found in your driver's manual, on a sticker on the window of the driver's door. 55:1 Positraction 4-Speed CD 3. /lbs. December 23, 2019. Re: gear ratio codes? 07-08-06 06:12 AM - Post# 965398 In response to Boog GQ1- J55 GM PRODUCTION OPTIONS RPO DIVISIONAL RPO DESCRIPTION 5VI. What the P0730 code means. it has problems after its nice and warm shifting into gears, goes too high of rpm before shifting and then will slam into gear. This yields a slightly different M20 ratio set. Kit components may vary from illustration depending on your truck's model. 23:1) and GU6 (3. 70:1 Continue reading → GM FWD Torque Converters GM uses the same type 4-digit ID method of identifying FWD torque converters as with the RWD units, however the digits have different meanings. 1967-69 Camaro Rear Axle Code Location. A 'C10' would be a 2wd truck because the 4x4 models use the 'K . GM also used a 2. 00: W-code: 2. Back in 1992, at a local swap meet, I paid $30 for the same GM factory Service manual for my 77. 55 Ratio Premium R&P Keep in mind that incorrect ratio codes typically require advanced mechanical ability and diagnostic tools. RPO Code Revision Request Form. Date codes Just like a 10-bolt rearend, there should be stamped numbers on the axle tube – on the passenger’s side. Axle Ratio = (RPM X Tire Size)/ (Speed (MPH) X 336) Example 4. GU6 Rear Axle: 3. The 4 series ring gear is thicker than the 3 series, hence the spacer. General Motors rear . Left side drop output and has a low gear ratio of 2. Third Gear Fourth Gear; P-code (wide ratio) 2. All rear gear options, 1991-1996. D. Step 2. 70:1 Continue reading → Serial numbers for Muncie 4-speeds always begin with the letter “P,” which stands for Muncie Plant (not “passenger car. Performing a Clutch Test with the use of a scan tool and a shift box would immediately show that none of the internal components is slipping, thus pointing to the . In 1970 the rear end was built in both 10 and 12 bolt versions. 08. Dave. 73 Ratio GT5 Rear Axle: 4. 00: S-code (close ratio) 2. The easiest way to find out what gears you have in your truck, is to look in the glove box. You can typically find your RPO code on driver side door panel or glove box. 73 rear will get it. As for the location of ID number on axle, it is on the bottom of tube adjacent to carrier housing. GT4 - 3. Notice how the mounting holes are on the top side of the gearbox. However, we have also seen the codes stamped on the front, top or bottom of the tube – as well as on the left side. The TCM is a standalone Delphi unit which is shared with several other GM applications such as the 9T, and 10L transmissions. Borg Warner Second Design ST-10 4-Speed Info. GM, for example, has front-wheel-drive transmissions with several different overall gear ratios that if incorrectly used will cause the computer to produce gear ratio codes. This list is exclusive to 67-72 chevy and GMC trucks but if you find that an option is missing drop me a line and I will get it added. 47: 1. Labor: 1. We will assume it is a 10-bolt – but that makes it a plenty strong 8. 29 37/33 2. GM 3790628-11 37- 66. 36 37 ring gear teeth divided by 11 pinion gear teeth. 5" ring gear was used in Chevelles. 0 was swapped into it with a 4l80e. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Gear ratio changes are possible as long as the ratio selected is within the . 40/13. GEAR VENDORS, INC. 6L80/6L90. Letter: A M20 Ratio Letter: B M21 Ratio Letter: C M22 Ratio. 11:1 Positraction 4-Speed CF 4. 4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER. 73, 4. 55 Ratio Premium R&P FLOOR,CARGO (SMOOTH STL) E72. 10 RATIO. com Ford rear ends sometimes had tags under one of the carrier bolts that had the ratio and a code for being a LSD or not. Sporting a five-pinion planetary carrier, a 300mm input shaft over the 4L60E’s 298mm input shaft, and a better 3-4 clutch, the 4L65E comes with the following gear ratios: 1st gear: 3. Note that the ring gear size code is NOT a RPO code that would appear on the vehicle RPO code list. Note: This code is similar to P0729, P0731, P0732, P0733, P0734, P0735 and P0736. Not all vehicles are set up the same, even though they may be the same make and model. GT4 Rear Axle: 3. Important Notes Some input shafts produced by the aftermarket and General Motors have no identifying rings on them. 253 (4. 23 ratio GU6 Rear axle, 3. Thanks for any help Discussion Starter · #1 · Feb 5, 2010. 29: 1. Only show this user. 08:1. 35: 1. M5X T ransmission, 8-speed automatic P0730 MAZDA Incorrect Gear Ratio. It is easy to identify because it mounts on the outside of the frame and the mounting tabs are on the opposite side of the gearbox. 88. G80: Locking, Rear Axle. It has an oddly-shaped 16-bolt pan with 13mm bolt heads. 76. Let me know if this helps! Garrett Transmissions after this period have a higher 5. This is due to federal noise pollution regulations GM had to conform to. 3. 72: 1. The 1962-63 serial numbers are located on the front, right side of the differential carrier. 73 Z28 to run. Locate the VIN Code: First and foremost, you need to find where the VIN code of your vehicle is at. There is no need to perform any diagnostics or replace any parts. 75 to 2. 56 means that as the axle turns one whole circle the driveshaft turns 4. 4CBB 3800 SC Pontiac W platform - KB7 TAPShift Option HD 3. This chart applies to most GM 8. GU4 -- AXLE REAR, 3. 4l80e p0730 incorrect gear ratio code. Designed for longitudinal engine configurations, the series includes 4 forward gears and 1 reverse gear. This code will tell you the ratio, whether it is posi or . 56:1 Positraction 4-Speed CJ 3. Gary. GM A-body codes from tech. The two gear ratios available in the Intrigue were: code FR9- Ratio, Transaxle Final Drive, 3. You will have one and possibly two of the following codes if you have the G80 option. 23 RATIO. The external VSSB/DRAC (Vehicle Speed Sensor Buffer / Digital Ratio Adapter Controller) module was used in 1989-1995 General Motors vehicles in many applications. Bolts directly to the stock location and works with the factory power steering pitman arm. 67-69 Rear Axle Code Location. GT4 -- AXLE REAR, 3. , 2BX) usually indicates a posi. Here are the differential options offered on my 03 Astro as an example: G80 Differential, locking, heavy-duty, rear. Maximum (Max) road speed: 75 mph. 46: 1. Ratio: Plant: Day of Year: Shift: Posi Source: See Below: B = Buick C = Buffalo D = Cadillac G = Detroit Gear & Axle K = GM of Canada M = Pontiac/Canada O = Oldsmobile P = Pontiac W = Warren, MI: 001 = January 1st 002 = January 2nd 031 = January 31st etc. 73 ratio. The 14bolt is found in a huge number of GM 4x4 pickup trucks and vans, 3/4 and 1 ton, from the 70s right through until at least 2000. Looking up the GT4 code via Google, or any GM reference literature, the code shows your truck has a 3. 73:1 gear ratio . 5-inch ring gear diameter – not the 8. With G80 = with limited slip, no G80 = without limited slip. 73. Rear axle RPO 092, 4. 20 first gear in the 1963 production year, depending on engine size and rearend ratios. HE3 - 3. 69 GM NP261 Transfer Case. 875" Pinion Diameter / Spline: 1. You need to tell us some more about the . 6L Duramax diesel engine combines enhanced performance, fuel economy, and operational flexibility with an industry-leading reputation for reliability. The 4L60E (and similar 4L65E) is a series of automatic transmissions from General Motors. Note that the definition of this code will vary depending on the vehicle’s make and model. 2-inch. 56 circles. January of 1970. P0730 PONTIAC Incorrect Gear Ratio. GM / Chevy - Differential IdentificationShop by your differential. 08 Ratio R&P: SG GM55P-308: GM ’55 Passenger – 3. You should have a sticker inside your glovebox with an axle code: GT4 Rear Axle: 3. info@gearvendors. 88 and 5. Copy the number down in sequence using the pen and paper. 5" rear end parts for 1-ton trucks. Note: The definition of code P0733 may be different depending on the vehicle manufacturer. 5W7. 7L 350. Speedo Driven Gear & Fittings: . HC8 - 3. The cost of diagnosing the P0730 CHEVROLET code is 1. 86 (5 6/7) 50. P1871 Undefined Gear Ratio They come in different sizes, and the ring and pinion necessary to change the ratio are specific to these sizes. 42:1 first "Z" ratio. G60 - Rear Main And Auxiliary Springs (30 model series only) G80 - Locking Rear Differential. The P0730 code is often associated with the P0729, P0731, P0732, P0733, P0734, P0735, and P0736 trouble codes. 44 diff and T-Bar Floor Shift. The span between the 1 st and 10 th gear is wide; however, GM and Ford’s 10-speed transmission is relatively tight. Grand Prix. 73 only ratio available on diesel trucks. Torque converter slip ratio = A x C/B. It is simpler than counting ring and pinion teeth. 00. fullthrottledan said: Its probably a 3. 10 RATIO (DUP WITH GT5) GU2 AXLE REAR,2. 435 inches. 5" rears have a rounder shaped cover with a raisedhorizontal area in the middle. 42 RATIO. Various versions of the T-10 were used for AMC, GM and Ford. 00: U-code: 3. 55 Ratio . An extra heavy duty close-ratio version (M-22) was also offered on many of the big-block high-performance models. General Motors optioned cars with either the M20 or M21 ratios based on engine types and axle ratios. 93 JZFM 258mm R115 YesIMS. 70:1 Positraction Manual Transmission AP 4. 08 RATIO. 98 Chevy Silverado 4x4 Z71 5. GM 3790628=part number. mp1222ld mp1226xhd gm '07+ (nqg code) . The "small" GM 14-bolt has a 9 1/2-inch ring gear diameter. 42 ratio. 2-inch is smaller at 1. Type: Notes: TY856WB1AA: 3. You can do this by multiplying by the gear ratio. 875" - Car 12-Bolt Ring Gear Diameter: 8. the pinion. 73, i changed the number from VCM editor, but still the speedometer not correct, i think we should change the V/N Speed but i dont know the correct number for it, any help for V/N speed and fix the speedometer . 74:1 first gear ratio, with overdrive being 0. Code: 1st Gear : 2nd Gear: 3rd Gear: 4th Gear: 5th Gear: 6th Gear: Final : Center Diff. G80 - Locking Rear Differential. com, those rpo codes do not go as far back as 73. Just trying to get an idea of what I got without pulling the diff cover. In early years GM seems to have switched and swapped transmissions as necessary to obtain the total torque multiplication desired, rather than re-gear transmissions for individual applications. The 7. Re: axle codes to rear end ratio? « Reply #1 on: April 22, 2010, 02:35:53 PM » side note, i did look at 73-87. Prior to 1966 order options really didn’t exist for Muncies. 0 Output range: 3-phase, 3. 08 Ratio GU6 Rear Axle: 3. For RPM codes make your gm parts dealer your best buddy. com. Gears are multiplier of torque. 44: 2. 00: BB-code: 4. A lower gear (3. 42 so im . 73:1. P0730 MERCEDES-BENZ Incorrect Gear Ratio. 1717 North Magnolia Avenue, El Cajon, CA 92020 Toll Free 800-999-9555 • Telephone (619) 562-0060 • Fax (619) 562-1186 Need to find out which 350cu. For Example: 235/45ZR-17 (235 x 0. Acknowledgements Rear Axle Identification. Divide the 41 by 11 to get 3. 21 Rear Axle Gear Ratio. 64]. The photo of a 1969 10-bolt axle stamp (PG0424G1) is taken from below the driveshaft, looking toward the passenger-side leaf spring. HC4 - 4. Vehicles with an automatic transmission are equipped with a torque converter that’s located between the engine and the . We make it easy to verify your exact rear end by providing specs and year, make, and model applications for . 00L : SECONDARY COLOR, EXTERIOR, PRIME 00U : PRIMARY COLOR, EXTERIOR, PRIME 01L : SECONDARY COLOR, EXTERIOR, SPECIAL (91) 01U : PRIMARY COLOR, EXTERIOR, SPECIAL, (91) 02A : STRIPE COLOR, ACCENT, TWO TONE, BEIGE/GARNET (93) Diagnostic Trouble Code (DTC) P0730 stands for “Incorrect Gear Ratio” or “Transmission Control System Malfunction. 5,528 Posts. The 1-70 is the date when it was built. If you have the rear axle's code from the Certification Label on the driver's door jamb you can find the axle ratio, as well as the load rating, in the following tables. 4 For heavy loads: Model GM-LLJP Service factor: 2. GT5 - 4. But the rear end gears could have been changed . 1969. 57 gear ratio equipted Eaton axle that I have, the ring gear is dated 10/66. Type: Front Diff. RATIO CODES. Both of these are semi-floating axles. GM Classics is not associated in any way with General Motors Corporation. 41/10 =4. Figure 3. 5 to 1/60 For uniform loads RATIO CODES. The NP261 Transfer case is used for more heavy duty applications, being reserved for mostly truck and van use. 04. The NP261 transfer case was manufactured by New Venture Gear. I run a set of Yukon 3. The TCM compares the calculated gear ratio to the known gear ratio for each commanded gear. Fig. 0 : Cylinder Unit, For Single Key System, Coded 37d2 602 : Reinforcement Pick Up B0x 602 : Trim Combination, Leather, Lt Driftwood (2) Sporting a five-pinion planetary carrier, a 300mm input shaft over the 4L60E’s 298mm input shaft, and a better 3-4 clutch, the 4L65E comes with the following gear ratios: 1st gear: 3. Option code list. i have replaced the line pressure solenoid, and also the vss sensor in the transfer case and it didnt change . GM RPO Axle Code List (F) The following is a complete list of GM RPO axle codes for Chevy . 29 FLQB 245mm 163 NoIMS. 4) + 17 = 25. 73 might have to go to 4. 761: 1. 72 to 3. 73 Rear Axle Gear Ratio. Re: gear ratio codes? 07-08-06 06:12 AM - Post# 965398 In response to Boog GQ1- J55 GM PRODUCTION OPTIONS RPO DIVISIONAL RPO DESCRIPTION F60 - Heavy Duty Front Springs (Came With HD Front & Rear Shocks Recommended For Snow Plow Use On 1/2 Ton Trucks) G50 - Rear Heavy Duty Springs. The gear ratio most interesting to 4x4 truck owners is the ratio between the driveshaft and axles - the differential gear ratio or axle gear ratio. All differentials have a stamping code indicating gear ratio. 73 GM 8. Please select a rear end that matches your vehicle below. AMC used a 2. 81. 2 kW Gear ratio: 1/7. 2L) V8. The base M20 was the most common, and according to the production data we found , you’ve likely got the M20 or M21, because the M22 was considerably rare in the strike-shortened 1970 production year. GM RPO Codes – Factory Identification Labels and Interpretation GM RPO Codes or General Motors’ “Regular Production Option” codes contain lots of valuable information about your GM vehicle. The information in the VINs may vary slightly. 6" / 218mm Ring Gear Diameter: 8. 36:1 Standard Manual Transmission or Powerglide CB 3. Front Axle Codes. GU5 -- AXLE REAR, 3. For example, P0101 indicates January 1. 5" rears have a differential cover that is smooth and kind of a squared off oval shape. of torque to the pinion gear and the gear ratio of the ring-and-pinion is say 4. 08:1 rear gear ratio. Hanging 12. This axle came out of a 67 3/4 ton 4x4. 0 hour of labor. but know that most semi-floating 14-bolt axles have the common 1/2-ton 3. RATIO CODE-4. 90 = 11. The best and true way to find the gear ratio is to remove inspection plate and check the ring gear for ratio or count the pinion and ring . GM Powertrain will transition from Dexron III Automatic . The standard axle ratio found in a GMC truck or SUV has been carefully selected according to the vehicle’s specific body style and engine in order to provide the best all-around mix of performance, towing strength, and efficiency. 1967 rear spring mounting pads had a raised 'hat' design and tapered coil . J55 - Heavy Duty Power Brakes. Muncie 4-speeds were produced in two different ratios wide ratio (M-20) and close-ratio (M-21). The BOM stamp (2) or Axle Identification Tags (2A) are used to identify Dana axles / differentials. 54 and a 2. gm#552746, 13-40 GM K code-GAH K 111 2 differential- GM 8 K ? 8" GM canada Gm#=14030352 Thanks for any help, steven m Discussion Starter · #1 · Feb 5, 2010. ZF reg-duty / 4F med-duty 4-pinion. DRAC module information. 73 gear ratio. A 3. 88 = (2881 X 37)/ (65 X 336) I have a 80's S10 differential whole axle I can t find the axle code info and gear ratio, given to me. Ford also used an axle code on the body tag on some models. 5-inch pinion diameter is 1. BODY -P10-P910-P15. 17. 67:1. The mathematical equation for Horsepower is; Torque X RPM/5252 = HP. 10: GT5 or GT8 or GW8 or G84 4. 56: G82 or GS6 or HC4 General Motors OBD-II Trouble Codes. LPO, Cargo tie-down rings. Below are the stock gear codes found in the glove box. Looks like the standard ratio axle for a C10 in 1981 is 2. 1957-1958 Code Ratio Type AE 3. ASPECT RATIO x 2 ÷ 25. For simplicity, I generally calculate at 60 mph - here's how the tire size/gearing/rpm formula pencils out for my current set up, and for the ratio changes I'm considering. The KC code identifies it as a 1974 rear axle assembly with a 3. May 03, 2019 GM, for example, has front-wheel-drive transmissions with several different overall gear ratios that if incorrectly used will cause the computer to produce gear ratio codes. 33: 1. This code is usually located on the right side axle tube near where the steel brake line is located. 73 and lower (numerically higher) came . 42:1) will require a lesser amount of torque than a higher gear (2. All 125-C, 440-T4, 4T60, and 4T60-E transmissions use the same style torque converter, and they are interchangeable before 1996. (example: P8R23 is assembled Oct 23, 1967 for 1968 model year. All GM units and 1993+ Dodge units have 10 splines with 1-1/8" diameter. 11:1 Continue reading → Here is a picture of a 1967 4. Symptoms of a P0730 trouble code may include: Cars meant for acceleration have lower gears, usually something numerically above 3. Usually (but not always), the PCM will set a ‘gear ratio error’ transmission diagnostic trouble code. Consult the . 76: 1. 56:1 Ratio. When you find this 9 digit number you have to read the numbers from the fourth digit to the eight digit. Click to expand. That would price the axle assembly at $143 including a $20 core charge. com Gear ratio info from gnttype. Here is the gear/locker codes:drink. Gear ratio codes; TCC slip; Flare shifts; Boost Valve . i. It will not help you in any way to find your particular steering gear. 23 Z28 to run in 1st gear (speed would have been higher than redline RPM), but not too high for a 2. & H. 73:1 Ratio. Note: not all the RPO codes listed here may necessarily apply to the El Camino, but all apply to 'A' and 'G' bodies 1978-1987. 36:1 Positraction Manual Transmission or Powerglide CC 3. The P0730 code identifies a problem within an automatic transmission. 56 / 2. GM AXLES– Ring and Pinion Gear Sets: GM ’55 Passenger: Sierra Gear & Axle Part # GM ’55 Passenger – 3. 56. P0730 is the OBD-II generic code for an incorrect gear ratio detected in an automatic transmission. 43 ratio: GM Specific Codes. 2: look in your glove compartment and look for one of these RPO codes: GQ1 -- AXLE REAR, STD RATIO. You can do one of two things: take your VIN number and call the dealership, they will give you more information you can think of. in engine you have. 42 Ratio. 05-12-2007, 11:03 PM. They have a 40% off sale starting on the 12th. The ratio should be stamped on the ring gear also. For example, a 3. A: Output shaft revolution signal from revolution sensor. Trans. 93:1 . It was used in the rear of 1964-and-later GM pickups, and in the rear of 1984-91 3/4-ton Suburbans. 34: 1. 636: 2. The 10-speed transmission offers a 20% decrease in RPM during shifting. Click FIND below to search for a code! MISC. 27 gear ratio was available only for a while in the beginning of the 1961 model year. 29 code F83- Ratio, Transaxle Final Drive, 3. Multiply this number times two equals ratio. Some Muncies also carry ratio I. Date codes GT4 - 3. org H-body axle codes from v8monza. ZE reg-duty / 4E med-duty 4-pinion. This gearbox was found in GM trucks and SUV’s up to 1986. P0730 SUZUKI Incorrect Gear Ratio. 5.


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