Gm Rear End Codes

The highest quality differential parts available for race, offroad, or street. Axle and engine codes are only a small fraction of the useable data. GU6 -- AXLE REAR, 3. Since listing them all within this article is impossible, we'll be focusing only on visual identification. Not all vehicles are set up the same, even though they may be the same make and model. 5-inch is often referred to as the “GM corporate 10-bolt” because of its multiple uses, and the 8. The rear axle is final component of the drivetrain to be covered on this page. I've seen it copied here, or in a link to another site. the RPO codes are not the same as the axle codes (though it would be helpful if they were), and the axle codes are what I need, for the 1973 through 87/88 one ton dually's. * These ratios were offered with the optional 12 bolt rear end(455 only) A sticker with the code was applied to the left brake drum. Some enthusiasts feel the 9-inch is a comparable replacement – and an acceptable swap into a Chevrolet muscle car – but when. There are 2, one is 3. 5 is setup for use with the disc type system. The military Model 25 has a thick, cast cover, while the 27 and civilian-model 25s have a thinner cover, will accept taller gears, and backed V-6s. the corporate 14 is a semi floater. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. You could never use a locked differential on a street driven car, as slow speed tight turns would break the axles in short order. 10 and down carrier and 30 spline axle shafts is an extremely popular and desirable axle. This list was compiled from multiple GM references and from actual vehicle data. A manufacturer code will be metal stamped on the axle tube adjacent to the carrier for field identification. Call us today at 877-776-4600 or 407-872-1901, or use the contact form on the contact page to send us an e-mail. 08 RATIO GU5 -- AXLE REAR, 3. you cant really tell if you have a 373 compared to a 410 by spinning them from my experiance. This gm casting numbers from Engine Block carnifyed the persian Chevrolet but it was legendary. Front Suspension – Lubricate 4 fittings (2 fittings on each side) with water resistant EP lubricant (General Motors standard GM 4751-M1. 23 k k gto reg brakes 1964 3. thanks all. It has numbers on the case:GM15,3856525 with a N above it and the Vin# is C154 - 6Z137529. 1997 seems to have two different types installed, and there is no RPO code to tell me which is which, the VIN does not indicate, and everyone I call seems just as clueless as me so again, does every 1997 1/2 front differential have two plugs form the harness, or is it possible that some only have onebecause THATS what I need to know. 08 Rear End Differential OEM USED-This 1955-1956-1957-1958-1959-1960-1961-1962-1963-1964 Chevrolet 3. 73 RATIO GT5 -- AXLE REAR, 4. Chevrolet Corvette Online resources for the 53 - 82 Chevrolet Corvette. BTW, we also have 2 differentials available. Welcome to the Chevy Check Engine Light codes page. QU40221 19 Spline Outer Axle Shaft for 1977 to 1991 Chevy, GMC Corporate GM 10 Bolt Front Axle is a genuine original equipment outer axle stub shaft for all GM 10 Bolt front axles in 1977 to 1991 Chevy Blazers, GMC Jimmys, and Suburbans, plus Chevy, GMC 4x4 1/2 ton and 3/4 ton Pickups. My priorities are first motor, second rear end, third body and paint, fourth tires and rims and lastly upgrades like a/c, brakes, power steering etc. 10 RATIO GU4 -- AXLE REAR, 3. 78(providing the gears haven't been changed). 440 and Street Hemi cars with a 4-speed should have the 9-3/4 axle, which was manufactured by Dana and is known as a Dana 60. PONTIAC Axle Gear Codes Wallace Racing Code Location. Our large inventory will ensure your GM parts order will arrive direct to your door in no time. GM Axle code GU2 March 2nd, 2006, 07:30 AM. rear end chuck, dont want to doubt you but i believe it is either a dana 60 or dana 70 rear. Some enthusiasts feel the 9-inch is a comparable replacement – and an acceptable swap into a Chevrolet muscle car – but when. Read how Chevy High Performance Magazine Evaluates The Advantages And Disadvantages Of 9-Inch Vs. Make: Model: Description: Pinion Bearings: Carrier Bearings: Pinion Seal O. Check application listing to insure that you have identified the correct front end. I have GM rear end in my '51 Merc that I need to ID to be able to buy parts…specifically a u-joint at the moment. 5" coporate rear axles. Rear Numerical Codes: Code: Positraction: Ratio: CC : 3. 5" is the most common rear axle and is still in use today in GM rear wheel drive cars and trucks. Disc Brake Type Rear End. Rockwell differential parts, ring and pinion sets, power divider, positraction, spools, Detroit lockers, axle gears, seals, bearing overhaul kits and diff case Parts. 73 41/15 CRX CRY 1970 Firebird 3. There are some variations of the rear differential for Chevy 10 vehicles. Axle Identification Chart DANA 25/27 These Danas are indistinguishable in appearance. The "Third Generation Camaros" require mount points on the differential for the torque arm, trailing arm links, spring pads, panhard rod and shocks. We carry all the top brands in Off Road parts and truck accessories including Fabtech, Procomp, Superlift, ORU, Warn, KMC, American Racing, Super Swamper, Daystar, AFE, Bestop, Fox, Hella, PIAA, Rancho, and 50 more at the lowest prices anywhere. Select your rear end housing in either a bare or powdercoated finish and add it to your cart. LIGHT DUTY TRUCK REAR AXLE IDENTIFICATION. Your Part Request is sent to qualified truck part companies that will contact you directly if they have your part. The rear end has probably been blown up sometime in it's life and someone replaced the center chunk with one found out of a junkyard that was used on another GM model. PONTIAC Axle Gear Codes Wallace Racing Code Location. 5″ Rear End February 20, 2019 Roadkill Customs How To & DIY Tinman 2 Kustoms shows how to rebuild a 10 bolt Chevy 8. Please enter your desired user name, your email address and other required details in the form below. The auto repair labor rates vary widely across the country, and even within the same city. Price Match Guarantee! Welcome Guest. For example, the all-new Chevrolet Silverado 1500 trucks have two axle ratios, which are determined by the engine/transmission combination. 5-inch unit. 75 inch four pinion rear end, produced by GM Holden's Limited of Australia (Firebird WS6 cars went to this unit in 1986). Rockwell Differential Axle Codes · Rockwell Differential ID Chart & Profiles · Differential ID Locations, manuals and parts. The 1964 serial numbers are found on the bottom of the carrier. 1955-1964 Chevy 3. Nationals Become The Sport's Biggest Event Did Fast 'N Loud Make This Up? Bloodhound SSC Will Attempt to Defy 800 MPH On October 15, 2016 Classic Trucks »Chassis & Suspension Rebuilding and Improving the GM 8. Chevy Chase, Actor: National Lampoon's Vacation. 2" Axle / With GM 8. YEARONE Classic Car Parts for American Muscle Cars | Barracuda Cuda Challenger Charger Chevelle Road Runner Camaro Super Bee Dart Duster Valiant Firebird GTO Cutlass 442 Mustang Nova GM Truck Skylark GS Monte Carlo El Camino Mopar Chevy. In this tech tip we'll show you how to identify what type of GM differential you're using by decoding the RPO code (or option code) found on a factory placed sticker in the interior of your vehicle. If you find a 2nd Camaro rearend with a ratio you like, grab it. Chevy Chase was born Cornelius Crane Chase in Lower Manhattan, New York, to Cathalene Parker (Browning), a concert pianist and librettist, and Edward Tinsley "Ned" Chase, an editor and writer. The rear axle identification number must be known to order the exact replacement parts. Many custom made axle housings for the GM boys utilize the 9 inch Ford, even though they hate to admit it. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there?. I have a GM 12 bolt rear axle. The codes are: B for Buick, C for Buffalo, G for Chevrolet-Gear and Axle, K or M for GM of Canada, O for Oldsmobile, P for Pontiac and W for Warren. We Recommend Corvette Black Book from Amazon for Stats, RPO Codes and easy to flip through facts!. Note: Most 1969 C3 Differentials were manufactured at Warren and are suffixed 'W'. Easy to use parts catalog. These tags have a wealth of information about your specific vehicle's equipment and specifications. The GM 14 bolt axle with 4. A manufacturer code will be metal stamped on the axle tube adjacent to the carrier for field identification. We have what you need in great variety and high quality all under one internet roof. 07: CE: X: 3. Look next to the rear end cover bolts at 5 and 7 o'clock. The F100 should be the date code - June 10, 1970 I've read where all 10 bolt 1970 GTO/Lemans had that axle code, 9799100. The rear axle came off of a 1991 Chevy S10 two wheel drive truck. 08: 40/13: XE: ZE: 1965. The ring gear is not held on with 14 bolts, but rather 12. It has RV 0306 W 2 stamped on top of Passenger side axle housing. EVAP Emission Canister Switch (GM p/n 24506192 / ACDelco 212-358) 1441 Code Engine Wiring Harness [ worn at back and behind engine due to rubbing on stud - created MAP Sensor 0107 code (replaced sensor twice), short in backup light circuit, true cause of EVAP Purge Valve circuit failure, and other “mystery” engine codes that came and went ]. Need help identifying your differential or not sure which replacement or performance parts you need?. 5", common under 3/4 and 1 ton trucks from Chevrolet and GMC. I have a 10-bolt chevy rear end and I found this code stamped in the axle tube on passenger side: XPK K211 1. 5" axle, commonly known as the GM "14 Bolt", is an extremely popular rear axle due to its strength, availability, and healthy aftermarket. 10 bolt truck rear ends were not available until the late 70s - 80s. Discussion in 'Chevy C/K Truck Forum' started by david mac, Mar 1, 2010. For servicing the rear axle, the third letter must be known, which is the manufacturers identity. THe code is stamped on the right axle tube (as viewed from the front of the car) on the forward side. The system also set a code B2527. 0 liter Mustang LX Coupe (notchback) was the "trimmed of all fat" and low-optioned, 3,100 lb ultra rare 1LE code Camaro. GT5 -- AXLE REAR, 4. I have a gm axle with the stenciled code pj g91931 and a casting no of 1254333. 25" and and afterwards were 8. Rear ends with measurement designations are named after the diameter of the ring gear, i. Just brought the truck home tonight and going through the RPO codes, making a list. 07 from a 68 Camaro. 07 12 bolt 43. 73 ect up to GU6=ratio 3. views 12294 Gt4 is the option code on mine, of course I would have to buy the one that has the wide track option. 5-inch unit. What many owners may not realize, is this rear should be serviced every few years and this GM Limited Slip additive should be put in with fresh fluid. If you want your 1955-1959 Chevy Short Box Truck to drive like a modern vehicle but don’t want to spend thousands of dollars for an aftermarket frame, our bolt-on S-10 chassis upgrade conversion could be just what you are looking for. Give us a call at 800-216-1632 to get started. RE: how to read the vehicle codes on chevy trucks to determine gear ratio of rear end. 10 2 pinion open 7. The Borg-Warner logo is also cast into the bottom of the differential case. Shipping a Camaro rear end isn't hard. The system also set a code B2527. The code was also stamped in the axle housing to the right of the carrier. com Your online Classic Chevrolet information resource. Axle or Differential Identification Chart - Dana Axles GM 12 Bolt Ford 9 Inch Etc. These options are also known as the RPO codes. 5 is setup for use with the disc type system. 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. Identify General Motors, Ford and Dana Spicer codes using resources from Differentials. 55 No12 boltDana DD 3. Hey guys my 02 Tahoe has a GU6 3:42 rear axle with the tow package. While the 14-bolt can still be found under many late-model GM 2500HD gas trucks and Suburbans, most '01-and-newer ¾- and 1-ton diesel trucks use the AAM 1150 rear axle. Mopar Rear Axle Identified by casting number & number of cover bolts. 2" original rear won't have any bolts near the yoke and there will be a GM and a part # cast into the side of the carrier. RPO Code Definitions The following listing is most of the GM Production Options. Check out Part 4 of our Doomsday Diesel build as we rebuild an 01 to 10 GM ear axle to last forever. 5" ring gear, 1. Research the 2016 Chevrolet Colorado at cars. For servicing the rear axle, the third letter must be known, which is the manufacturers identity. Find the code (some codes were duplicated), match it with the year of your vehicle or the vehicle your getting parts from. The most popular rear end around is no doubt the Ford 9 inch unit, it is used by restorers, street rodders and racers alike, regardless of what brand of car the axle is going in. 73:1) or GT5(4. 2" original rear won't have any bolts near the yoke and there will be a GM and a part # cast into the side of the carrier. GM 14 Bolt Axle Overview. You look that number up in the back of the book and it will list all the applications and years that could have used the same part. There are 2, one is 3. A7293: 60-61 "P" CASE - rear end, posi GM casting #3743833 / CALL FOR DATES AVAILABLE - October 1960 was the last usage for the 3743833 case. C0379 Description The front axle control circuit consists of an electric motor actuator, which engages and disengages the front axle. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. GM 10-bolt Identification Guide. 14-Bolt Basics - Inside The Ultimate Junkyard Axle. Refitted and Painted. make / manufacturer: GM QR Code Link to This Post GM 12 bolt rear end, 70's vintage, was from a truck, unknown gear ratio, complete with axles, ring and pinion gear. the corporate 14 is a semi floater. 10 RATIO GU4 -- AXLE REAR, 3. GT5 -- AXLE REAR, 4. 5-inch is a semi-float axle, meaning it has only one axle bearing per side, mounted inside the axle tube. The Jimmy ZR2 was unavailable in the USA. This list was compiled from multiple GM references and from actual vehicle data. F=Assembly Plant Flint 05=Assembled May 12=Assembled 12th Day of Month WM=283 V-8 with Powerglide. Rocky Mountain Suspension offers leveling kits that typically only raise the front of your vehicle a modest amount, body lift kits that raise the body of the vehicle from the frame and suspension lift kits that are designed to raise the suspension components for greater ground clearance and space for larger tires and wheels. This Site Might Help You. For the first time, the ZR2 is offered in 2WD. The ID code for your 3. Sometimes the casting numbers can also be used to show whether an axle housing is a limited slip differential (LSD) or not. 0 liter Mustang LX Coupe (notchback) was the "trimmed of all fat" and low-optioned, 3,100 lb ultra rare 1LE code Camaro. Chevy Truck Parts 1947-2012 from USA1 Industries. com Your online Classic Chevrolet information resource. 55 f f gto reg brakes 1964 3. SVL Gears for the GM 12T Chevy 12 Bolt truck rear end are dependable enough to be backed by a six-month or 50,000 mile warranty. 42 or it may be GV which is the rear axle ratio codes. 42 2 pinion open 7. GT4 -- AXLE REAR, 3. Rear End Application Guide Ford 9 Inch Third Member Aluminum Case – Our aluminum cases are manufactured from premium material sourced in the USA, designed and machined in-house, and offered in various forms to meet the requirements of the most demanding applications. The codes are: B for Buick, C for Buffalo, G for Chevrolet-Gear and Axle, K or M for GM of Canada, O for Oldsmobile, P for Pontiac and W for Warren. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. 53-96 Rear End Gear Lube Additive - GM Posi - 4 Oz 0 reviews write a review A multi-purpose, extreme high-pressure lubricant recommended for manual transmission and conventional positraction differentials. contains an 8 digit code that tells the stock ratio, month / day of build as well as the production facility, either W - Warren or B - Buffalo K - McKinnon. In 1970 the rear end was built in both 10 and 12 bolt versions. * Engine RPO code and size following the rear axle ratio are taken from build sheets and/or Protect-O-Plates and may not reflect the only engines the rear axle codes came with. My Julian day of 191 was casted in my rear center section, I would go to a Julian Day Calendar and look up the 191 day which decodes to July 9, 1968. originally had drum brakes and leaf springs on it. The GM Corporate 14-bolt axle is one of the most favored rear-ends you can find used for under $500. Not many 3rd members will have those tags but the stamped code will be there if you can dig through the usual grease and crud. "O" Axle Only 12 Bolt Cover - 10 Bolt Gear Plate clutches. How To Rebuild a GM 10 Bolt Chevy 8. 5 10-bolt axles. t he complete manual on gm's ultimate performance differential. Listed 1967 "AQ" and "AR" codes & ratios may only have been used early in the 1967 model-year, or not at all. It’s easy to fall into the habit of re-placing common problematic compo-nents without verifying that they ac-tually are defective. com Your online Classic Chevrolet information resource. I was told this came out of a 1969 C10 with 6 lug. These RPO codes are used to idicate a specific type of differential and/or ring gear size. Buckda: posted 11-04-2003 09:26 AM ET (US). Some of the results relating to these new transformations are the development of new products for the GM Silverado and Colorado, Dodge Ram and the Ford F150. Axle Guys is the second hand provider of a S10 8. The 1962-63 serial numbers are located on the front, right side of the differential carrier. 1928-40 Chevrolet Car or Pickup AxlesAxle measuments for these 3 axles. Chevy Shows Off 2021 Colorado ZR2 Even though the calendar has yet to flip out of 2019, GM has dropped details of the 2021. 5-inch is often referred to as the “GM corporate 10-bolt” because of its multiple uses, and the 8. Had battery checked and said it was a bad ba 89 grand am will start and run but die Hello!. In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register. I have also listed a helpful gear to tire size chart to help people better understand. Rear Axle Code example: CB G 112 1 E (CB = Ratio, G = Plant, 112 = 112th day of year, 1 = shift, E = Positraction Source) Assembly Plant Codes Buick - B Buffalo - C Cadillac - D Detriot Gear & Axle - G GM of Canada - K Warren, MI - W Oldsmobile - O Pontiac - P Pontiac/Canada - M Shift: D or 1 = Day shift| N or 2 = Night shift Positraction. Our Service Center provides mechanic services of skilled and trained mechanics to assist in keeping your vehicle in top running order. What can be found on the axle housing is the stamped axle code with assembly date, housing casting number and date housing was cast. Rear Axle Assembly Codes The rear axle ratio may be determined by finding the two- or three-letter serial number prefix in the following table. Im hoping I have at least one 373. AMC MODEL 20. Proform 141-697 Chevy Bowtie Emblem Rear End Cover GM 12 Bolt Passenger Car. 1955, 56, 57 chevy bel air, 210, 150 differential parts for all years and models Eckler's Classic Chevys has a wide selection of Chevy Tri Five differential parts, and rear differentials. Real deal 68 dated 12 bolts are very hard to find in any condition. They will look up the axle you have now in a "Hollander" interchange guide. 1958-1970 Chevy Rear Differential code Identification Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. 5 10-bolt axles. 22 GT4 - Rear Axle (Duplicate of 5X1) 3. How to Read a Chevrolet Truck VIN Number for the Axle Ratio by Jody L. Dana axle identification is located on axle tube between Steering Shock Absorber Bracket and the Carrier. I don't know if Dana offers such a shim, or if you could get away with using one that happened to fit. Listed 1967 "AQ" and "AR" codes & ratios may only have been used early in the 1967 model-year, or not at all. The first 3 digits indicate the axle code, the next one indicates manufacturer (B=Buick, O=Olds, C=Chevy, P=Pontiac), the next is Julian date it was built and the last it. 25" and and afterwards were 8. The 1964 serial numbers are found on the bottom of the carrier. This Site Might Help You. Had battery checked and said it was a bad ba 89 grand am will start and run but die Hello!. 56 41/16 UC VC 1970 Big Pontiac 2. The rear end has probably been blown up sometime in it's life and someone replaced the center chunk with one found out of a junkyard that was used on another GM model. That don't make sense! It has a 250 L6 and a SM465 4 speed (not orginal). We have 3 bays service/installation and offer guaranteed workmanship and parts we can change your Chevy 8. Material: Steel with Carbon Fiber. The rear axle identification number must be known to order the exact replacement parts. AAM is a premier, global leader in design, engineering, validation and manufacturing of driveline, metal forming, powertrain, and casting technologies for automotive, commercial and industrial markets. 36 No10 boltDana DC 3. On each GM differential, there is a code on the ring gear which shows the number of teeth, and therefore the ratio. 5-inch rear end. Jump to Latest I have to find a S10 rear end with 4. Corvettes also shared this same differential. 25" Front Differential. If you are dead set on using the s10 rears here is some very useful info I found GM made two housings that came in these trucks, the 7. The best way to find that out is to visit a salvage yard. 10 RATIO GU4 -- AXLE REAR, 3. Look for the codes GU1=axle ratio 2. Metal stamp on left rear axle tube on the rear side,. Not all applications will have one of these codes but when they apply, they will be listed in addition to an axle code found in the main RPO axle code list below. rear end codes. These units can be identified by their 9 bolt (rather than 10) differential cover that has a rubber plug. The shaft of the 8. Rear ends for 1937-72 Chevys: Complete rears and parts, 55-64 center sections, positractions and non-posis and "P" case rears; 10 and 12 bolt rear. Welcome to the Chevy Check Engine Light codes page. The reliability of the axle tube and bearing are really the only problem spots you are likely to encounter with the 8. It's exactly the same as a Firebird/TA rearend and bolts right in. The bearings in this rearend are smaller than the Chevy version as is the ring gear diameter, which is 8½ vs. 08 RATIO GU5 -- AXLE REAR, 3. What can be found on the axle housing is the stamped axle code with assembly date, housing casting number and date housing was cast. GM axles are stamped on the axle tube (and sometimes the center section) with codes for the year and ratio. 23 RATIO GU6 -- AXLE REAR, 3. The Chevy's rear axle code contains information on the vehicle's gear ratio, date of manufacture and the rear axle assembly plant. 5" 10 Bolt axle, also known as the AAM 7. The 14 bolt differential is a popular axle swap option for Jeep Wrangler owners, and is referred to as the "corporate" 14 bolt because of the odd nature of GM's corporate structure in the 1970s. Remove the rear end cover and read it, then use the table above to figure the ratio. 25" Front Axle. 5-inch unit. What are the RPO codes for all cadillac Cars? RPO stands for Regular Production Order meaning that this is a list of the options available on cadillac cars. The Classic Truck Resource Page Vintage Truck Headquarters: Featured Photo Marketplace Classified Ads Photo Ads. 75" 9-Bolt Axle Codes *Note: Do not assume the codes are correct in these charts for 9-bolt/10-bolt identification. Classic Industries offers a wide selection of 1963 Chevrolet Chevy II Nova parts, including 1963 Chevrolet Chevy II Nova interior parts and soft trim, 1963 Chevrolet Chevy II Nova exterior sheet metal, 1963 Chevrolet Chevy II Nova moldings, 1963 Chevrolet Chevy II Nova emblems, 1963 Chevrolet Chevy II Nova weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. A rear end of a car is the combination of the rear axle and differential gears located at the rear of the vehicle encased in either a cast-iron or aluminum housing. Filthy Motorsports carries a wide range of parts, gears, and upgrades for the GM 8. Easy to use parts catalog. 10:1) gear ratio codes(the GT5 is hard to find). In the site click on the blue text links with your mouse to get additional option information. Some combinations of features have multiple axle codes, e. Rear axle identification First generation 1960-1966 Chevy C10 Trucks Rear axle identification - C10Trucks. Rear Axle Tips And Decoding. These units can be identified by their 9 bolt (rather than 10) differential cover that has a rubber plug. 1966 Chevrolet Nova The Chevy Nova was significantly restyled for 1966 with new lower-body sheet metal as well as the addition of a more streamlined faster looking roofline on the hardtops. there are four 12-bolt 3. 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. 25" Front Differential. 10 and down carrier and 30 spline axle shafts is an extremely popular and desirable axle. 11 gears b/c my truck's went bad, and my glove box sticker is gone. I have also listed a helpful gear to tire size chart to help people better understand. Now since I have posted links several times to a parts catalog and the GM parts Wiki I'm going to make you work just a bit. GM 14 Bolt Axle Overview. Then, search the site for the threads that discuss axle ratios (a lot of them). GM differentials come in a wide range of sizes. 8 1/8 for the Chevrolet unit. 55 rear end center section is an original used two-pinion type with cast arma-steel housing. All of these axles take different parts so we need to properly identify the axle you have to get you the right part. The rear axle came off of a 1991 Chevy S10 two wheel drive truck. Find Axle Shafts, Direct Fit with GM 7. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there?. Thus making differential ratio changes in a 440-T4/4T60 difficult, since the entire transmission needs to be disassembled in order to change it. 25" and and afterwards were 8. I can not find the decoding of the letters WAO 021 1, W80 C263, WDB C261. In Chevy Differentials: How to Rebuild the 10- and 12-Bolt, author Jefferson Bryant walks you through the entire process of disassembling, evaluating, and rebuilding the perfect differential for your GM application. These rears will work but wont hold up to serious powerThe Ford 8. Would an axle like this be original on a 74 Chevy K10, or might it have been a swap? On the front driver side, it looks like theres a "GM 55" stamped into the axle. BTW, we also have 2 differentials available. 12-Bolt Rearends. 5" is the most common rear axle and is still in use today in GM rear wheel drive cars and trucks. 73 Eaton Code Ratio Posi Notes Plant DA 3. The rear axle is final component of the drivetrain to be covered on this page. Dana 60 BOM Axle Codes To find the complete build details of any Dana 60 axle, locate the BOM number stamped into the long axle tube and then find that code in the table below. 08 rear end center section is an original used two-pinion type with cast arma-steel housing. 1973 GTO Axle Codes. The 1962-63 serial numbers are located on the front, right side of the differential carrier. 55 rear end center section is an original used two-pinion type with cast arma-steel housing. This axle housing is the next step up the ladder in terms of strength and cost. I have a set of Differential gears from a 67 nova 10 bolt rear. 10 RATIO GU4 -- AXLE REAR, 3. Commonly 7 or 8 digit ident number plus manufacture date. GM vehicles have a 'spid' label either in the glove box or on the spare tire cover in trunk with all the production codes. 10:1) gear ratio codes(the GT5 is hard to find). Is your truck a 6 bolt wheel pattern or 8? If 6 then you have a 9. Needless to say i have a lingering question regarding the rear differential. 75 (8 3/4) rear end LOADS FROM THE FRONT and IS THE ONLY REAR END THAT DOESN'T HAVE A REAR COVER. 5" diameter ring gear and pinion with a 3rd bearing at its nose that prevents gear deflection under severe loads. THe code is stamped on the right axle tube (as viewed from the front of the car) on the forward side. The ring gear is not held on with 14 bolts, but rather 12. Models include: Pontiac Firebird: Base, Formula, Trans Am, Ram Air & WS6. 36 No10 boltDana DC 3. 875" Axle 1957, Rear Clutch Kit by Nitro Gear & Axle®. General Board. and number: to the Old Online Chevy Manuals. 07 non-posi axles codes listed for 1968. list of modern GM rpo codes/option codes for general motors vehicles GM8 : AXLE REAR, 2. You may be a specialist that intends to search for recommendations or resolve existing issues. Corvettes also shared this same differential. Rear ends for 1937-72 Chevys: Complete rears and parts, 55-64 center sections, positractions and non-posis and "P" case rears; 10 and 12 bolt rear. RE: how to read the vehicle codes on chevy trucks to determine gear ratio of rear end. This is the last year that the ZR2 is available on a pickup. 08: 40/13: XE: ZE: 1965. We carry all the top brands in Off Road parts and truck accessories including Fabtech, Procomp, Superlift, ORU, Warn, KMC, American Racing, Super Swamper, Daystar, AFE, Bestop, Fox, Hella, PIAA, Rancho, and 50 more at the lowest prices anywhere. While this article focuses specifically on the GM 8. When it comes to GM muscle car purists - and enthusiasts searching for the ultimate Chevrolet rearend - the 12-bolt rearend is considered the top of the heap in regards to a high-performance axle assembly. Below are the stock gear codes found in the glove box. Rear Ends | 1971-1976 GM B-Body | Impala, Biscayne, Caprice, etc. 42 or it may be GV which is the rear axle ratio codes. Ordnance Spec. Axle Model and get Free Shipping on Orders Over $99 at Summit Racing!. Listed 1967 "AQ" and "AR" codes & ratios may only have been used early in the 1967 model-year, or not at all.