Chevy rear end identification codes. Example: CG1025B decodes to CG ~ 3.

Chevy rear end identification codes History and Identification of Chevy 10 and 12 Bolt Chevy Differentials 1971+ rear axle code: CB G 112 1 E CB Ratio G Plant 112 Day of year 1 Shift 1964-'69 1/2 ton 2WD Chevy, Some GMC 6 lug rear end 12 bolt coil spring set-up Ford car 56. Jump to Latest I have to find a S10 rear end with 4. Justin says: GM 10-bolt rear end under my 54 chevy wagon that I am trying to The ratio code is usually two letters (sometimes 3, sometimes a number & 2 letters), and is found on the right-hand axle tube. Retired law enforcement officer with over 40 years on the same department . If you click them and make a purchase, we may earn a small commission. This rear axle was available in GM's high-performance intermediate cars, full-size vehicles and light-duty trucks. User Info. I'm trying to find out if the rear end I've got is a 62-67 Chevy II original rear. RPO code can be found on the driver-side door panel or glove box. Any help is appreciated. The axle tube is stamped LE 0114K which to me looks like it may be for a 1970 GTO 455 but the LE code doesn’t exist for the 69-70 12-bolt, both for Chevy or Pontiac. 5 0r not. 3. 1955 to 1964 GM rear end differential with 3:36 gears. Ithink it may be from a 55 to 59 chev. 10 bolt truck rear ends were not available until the late 70s - 80s. Also, I notice a mysterious whining sound when driving at a steady pace; the sound is 1969 Camaro Rear Axle Identification. The GM 12-bolt rear axle assembly receives its name due to having 12 bolts on the rear cover of the housing. The rear axle identification code consists of a two letter prefix The casting numbers/letters on rear end housings may have either a prefix or suffix of "N" or "NF" and no reason Technical chevy rear end casting numbers. 1966 El Camino Rear Axle Identification . 350/TH350, 3. 08 3. 75" to 58" is 1965-67 Chevy II. Late yr model Edelbrock 1405,Saginaw 4spd/355 geared 55/6 Chevy rear. The casting number is 3959038 which is a (late) 1969 Chevy 12-bolt. Jump to Latest From what I can gather so far, the codes on my rear end point to a 1970 Chevy Nova. :willy: Thanks The identification code should be stamped on the bottom or front left or right axle tube either adjacent to the carrier housing or about 8" - 10" inboard from the backing plates. When i purchased it I asked for a 67-69 Camaro axle. If you have access to the RPO (Regular Production Option) codes, you can identify your GMC or Introduction To The Chevy Rear End Gear Ratio Chart. Explore Our Forums. 08 thru 3. Contact. I used to carry a spare rear end, with me in the trunk when I had my 409 powered '53 Chevy. The original owner claims all is stock, is 4-lug with 13" wheels inline The only rear end you will find in a 63-66 1/2 ton is the truck 12 bolt. Rear End ID. Save Share 2004 GMC 2500 4x4 6. Reply. (June 18) E2382 is weird. Then as the rearend center section proceeded down the line-----SOME WENT ONE WAY to be installed into a pass car axle housing and SOME WENT ANOTHER WAY to be installed into a Corvette axle housing. Identifying the correct rear end code for your Chevrolet is an essential step in any restoration or modification project. Also, there are "family" groups that must be matched to the rear end ratios such as 3. Speedway Ford 9 Inch Bolt-In Rear End Axle for 1955-57 Chevy Car. ' This is a book you might want to purchase. 78 thru 4. the e200 is cast in to the ham. Kenneth says: October 16, 2022 at 5:23 pm. Jump to Latest Trying to verify the rear end in my 55 is original. Model specific subject matter experts, Would like to identify the YEAR of a positraction rear end. 36:1, 1025 ~ Month [Oct] and Day [12], W ~ Warren (B=Buffalo, G=Chevrolet Gear & Axle, K=McKinnon Industries). Menu. It is like the VIN number for your axle assembly. To Rear The identification code should be stamped on the bottom or font of right axle tube either adjacent to the carrier housing or about 8" - 10" inboard from the backing plates. 5 rear end, you can use a combination of visual inspection about Differentials in GM vehicles can usually be obtained by looking at the RPO or “Regular Production Option” codes contained in the Service Parts Identification tag in the glovebox or the driver’s Hey guys here are few pics of the rear end on my '59 pickup. The differential bolts are on the pinion side like a Ford 9-inch. 73:1 - Tooth Combination 41,15 I climbed under the truck this afternoon and coudln't find the axle code on the tube. Casting number Driver's side appears to be 3725899; Appears to have date code next to it I299? 1956, and 1957 Chevy owners and enthusiasts. 5 inches, 8. 73:1 ratio. if this is a rear with the drain plug it is from 57 as 55,56 did not have also if i am correct the 57 axels are larger in diameter. Register or Log In To remove these advertisements. The code on the passenger side tube is: HA02 17W 2. You didn’t identify the number of bolts on the cover. RPO Codes Decoder - Find out what options your GM Chevy Buick Cadillac vehicle is equipped Chevrolet and GMC models. 08:1 axle ratio are shown as available under ZQ9. 2-inch, 10- and 12-bolt, and Dana 60. If a "1" or "2 Chevy 12 Bolt Identification by Moss Strohem . The driveline is hooked up to a 1969 Powerglide automatic trans and a The identification code should be stamped on the bottom or front left or right axle tube either adjacent to the carrier housing or about 8" - 10" inboard from the backing plates. I got very good at rebuilding them. S10 S15 Luv Blazer Register or Log In To remove will axle codes identify g80? and ratio? I don't care if 7. The rear axle identification code consists of a two letter prefix indicating the gear ratio, four digits indicating the assembly date as month/day, and a single letter suffix indicating the manufacturing location. 55 was the 3 speed ratio so it was AA & BA. Come join the discussion about restoration, engine swaps, reviews, performance, modifications, classifieds, troubleshooting, maintenance, and Here are some gear ratio RPO codes for looking in other vehicles for specific gear sets G72-2. 25" IFS front end parts, to Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. Pretty sure it's not a Nova rear end and it has some pretty fancy inside components. 5" 10 bolt rear end identification vs 8. 3) Member Rides 2. Locate a 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. The other image is my codes: Thanks! I also gave it the real test. 56 is one group and 3. Model specific subject matter experts, classified ads and more. RPO Codes : Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. The 7-digit code contains the axle code prefix, the month and day build code, an axle plant letter suffix code, and, on positraction axles, a letter code stamped Jump to: Driveshaft | decoding | ring gear identification | Speedo-gears Camaro Rear Axle Information The 1970 rear end differs from the 1971-1981 rear end. case are H1361, 3707306. 2" Look under a Monte Carlo or a Chevelle A or G-body car, as you have a modified four link with coil springs and will need the ears cast onto the top of the housing to work. With such a low sales of ZQ9 in 1971, one can conclude the 302 sales must be for the 3. 08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. This item is ready to go. Author Topic: Help with codes on a 12 bolt rear end (Read 9111 times) CA76K10. ,. 08 g92 : axle rear ratio, performance g94 : axle rear, 3. Now when google´ing the number 3707306 I end here. The "webs" on the pumpkin aren't large enough for the casting date or casting number. about Differentials in GM vehicles can usually be obtained by looking at the RPO or “Regular Production Option” codes contained in the Service Parts Identification tag in the glovebox or the driver’s side door jamb (B-Pillar). TR,TT,TU are 3. The HB is the gear ratio, 03 is the month it was built and the 25 is the day. The numbers on the diff. Thoughts? 12 bolt identification. The chart I have only has prefixes with two letters listed (1968 Chevelle rear axle ID chart--- the only chart I have from this website) with CK, CJ, CL, etc. Some To know your Chevy’s rear-end gear ratio, check the table using your RPO code. 55 12 Bolt AS AO, Hello, I need some help to ID a 10 Bolt GM Rear end, that has code DN (Delta Nancy) on the Axle Housing left tube upper, On the right side of the axle housing tube, has the number - 3142, and then another number that Chevy Forums FREE technical assistance for your restoration and repair. 07s HA,HJ,HQ,MF,TQ,MI,MK are 3. 5 rear end, you can use a combination of visual inspection and measurement. This code consists of 6 or 7 digits and characters indicating the stock gear ratio, month/day of assembly, and the assembly plant. 36 3. 73 gears and a posi in the rearend. 11 4. Read more about GM RPO Axle Identification Codes . However, it’s important to understand how to identify the proper The Positraction 4. According to noveresource BI was a 69 Nova 2. It's a little confusing in the tech book because it has all AB and BB codes 55-58 as 3. Can you help to identify this rear end so I can locat the correct parts needed? Thanks Anthony. 0629 ~ Month [June] and Day [29], B ~ Buffalo (G=Chevrolet Gear & Axle, W=Warren, K=McKinnon Industries). 10 ratios from the factory. 08, 0403 ~ Month [April] and Day [03], G ~ Detroit Gear & Axle. 73. The number on Author Topic: 12 Bolt axle identification and date code (Read 5211 times) 84Silverado4x4 Registered Users Can anyone help me figure out what the rear axle is originally out of or what any of this means. In 57 the 3. If it were A 8 1 it would be Jan 8th, 1961, for example. 1966 Chevelle/El Camino rear axle codes Miscellaneous. Plant Codes: B ~ Buffalo, New York G ~ Detroit Gear & Axle To identify a Chevy 8. A Chevy 3/4 ton pick-up may have a 14 bolt semi-float rear axle or a 14 bolt full-floating axle. "HB,LL,RA. number can be found in the webbing area surrounding the backside of the carrier housing next to the left or right axle tube. Careful differential identification will help make sure you get the right parts for the job the first time. This guide includes ford rear-end identification, Dana axle identification, and common GM rear-end identification tips. May 17, 2020 #1 Rich77 Full 12 bolt rear end ID at backing plate? koolminx; Dec 12, 2024; Differential & Driveline; Replies 5 Here is a small table of codes for 1965-67 rear end codes. 5 inches). the axle code shows WDCWDC. The code will tell you what was originally installed in the housing, but nothing about any Post: 1957 chevy rear end id number (Topic#263465) rodant Forum Newbie Posts: 83 Age: 40 Loc: fresno ca Reg: 11-18-10. 2 diff cover and it does seem to be an 8. First Generation Pictures; Choose Year to View RPO Code Information I just acquired a complete rear end from a 1998 Chevy S-10. BW 205 is the stamped gear ratio code and assembly date for 3. 08 10 Bolt AK AM, AU 3. Casting Date Examples. 99 More Info. Housing Casting After plenty of cleaning, I just found the codes for my rear end. I got mine many years ago from Classic Industries. Post: Rear End Identification (Topic#284454) Clive98 Newbie Posts: 13 Loc: Clive Iowa Reg: 07-21-12. Casting date example of H 20 4 for August 20, 1964. - I need help trying to identify a rear axle differential. Please select a rear end that matches your vehicle below. com website. 2 C-clip rear end. Chevrolet ~ Buffalo, 064 ~ day of year starting with January 1 (the 64th day being March 5, 1972), 1 or 2 ~ shift (if present), E ~ Eaton It has a 10 bolt, non posi rear end. Your rear axle should be stamped, on the passenger side, front, with a code for the ratio. 1956, and 1957 Chevy owners and enthusiasts. There are no ID tags anywhere. This is an example from a 1967 Chevelle and is stamped CB 1012 W. ZA 1001 ~ 3. The numbers that appear on it are: G158 3725899 GM22 It is a 10 bolt. Differential casting, GM54 and NF3896838. The driveline is hooked up to a 1969 Powerglide automatic trans and a Re: Differential Codes 10-06-04 06:23 AM - Post# 525023 In response to PAINE I'm guessing that the number is 8725899, which is an open axle 1957 rear axle. C3 Tech/Performance - Differential Identification - I thought I would share some info with you guys since I'm going through it right now. The rugged, reliable, and efficient Chevy 12-bolt has established itself as the preeminent rear differential 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 G = Chevrolet G&A Positraction Carrier O = Oldsmobile Positraction Carrier W = Warren/Warner Motive Decoding Rear Axle Codes. ZA ~ 3. The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 I am trying to ID a rear end housing that I have. Jump to Latest Hand stamped when axle was assembled with broadcast code (aka assembly part number), date of mfg and axle plant . According to Chevrolet High Performance, the most common GM/Chevrolet rear ends are the 7. 0l, 2009 Chevrolet Tahoe 2wd 5. Also make sure it really is "PS" and not "BS" (which IS a 12-bolt). Code ID. Plant Codes: B ~ Buffalo, New York G ~ Detroit Gear & Axle The rear axle identification code consists of a two letter prefix indicating the gear ratio, four digits indicating the assembly date as month/day, and a single letter suffix indicating the manufacturing location. I need to replace the pinion seal and the size doesn't seem to line up. 56 gear and, also, there is a blue and white decal on the driver's side inner fenderwell entitled SERVICE PARTS IDENTIFICATION and on this decal there is an RPO code GQ 1----Rear axle standard. 73 open rear axle code. I have been unable to get any help from Chevy on this so far and was wondering if someone out there might know this. Code on passenger side axle reads HA0426 Other codes Nf3896838 Gm56 any help I’ve searched all the charts and no luck well you remember wrong. Can somebody confirm my decoding? Front Passenger Side Code: KDC 096 1 = 2. CBTN C1 & C2 Corvettes - Rear End ID 3789812 - My rear end is #3789812 gm (P) which seems to be right however if I'm reading it correct the other # says C253was this available in 53 or am I not seeing it good enough at it is actually C258. Tech. Alright, it turns out that i do have the 2. The "CB" letters are the original ID code for a 3. Filling Station - Chevrolet & GMC Reproduction Parts Re: Rear end ID question. just not interested in g80 prefer 3. Casting Numbers: 12-Bolt Casting Rear Axle Codes The 1967 - 1972 Chevrolet & GMC Pickups Message Board. They were used to ID the raw parts to machined. The Bill of Material (BOM) number is used to identify Dana differentials. Chevy Forums FREE technical assistance for your restoration and repair. 2 although it does have those to little squared nipple corners on the diff which I read meant it was Hello, I checked my rear axle ID code to determine axle ratio and found CKD 0306B2. Keep in mind that any information obtained using the GM Assuming that the rear end previously has not been swapped or modified, you can use these plates for accurate identification of your rear end / differential. GM / Chevy - Differential IdentificationShop by your differential. This rear end came off my 72 Nova but I'm stumped as to what exactly it is. So far I have found: C1 & C2 Corvettes - Identify rear end. And yes the 7 figure gig is the actual casting number. 2 C-clip rear end but I'm not sure. 10:1 and the 3. DANA AXLE IDENTIFICATION . The rear axle identification code consists of a two letter prefix indicating the gear ratio, These seem to be a relatively rare rear end casting number for 1965 10-bolt Chevelles. . Rear axle ID Engine & Drivetrain Register or Log In To and I was told when I got the truck that its a 3:73 rear end, with posi. You should also find a date code casting in the webbing area, consisting of a letter and two to That's correct squirrel, code and build date. I can't seem to find a site to decode this. I have a Hollander at home. This code consists of 8 or 9 digits and characters indicating the stock gear ratio, month/day of assembly, and the assembly plant. The Chevrolet Gear & Axle: W: Warren ~ Michigan: K: McKinnon Industries: ZA 1001 ~ 3. 73, chevrolet built on the 81st day, 2nd shift. Could they have put it under the spring mount? I REALLY don't want to unbolt I was going to replace the seeping pinion seal on my 1955 Bel Air I have no info on what rear end was placed in it, maybe original. 36 Positraction, 1025 ~ Month [Oct] and Day [25], B ~ Buffalo (G=Chevrolet Gear & Axle, W=Warren, K=McKinnon Industries). 1970 GM (Chevy) 10-Bolt Rear End Code ID. 6" so they are not Re: 8. 07 ratio Decoding Chevrolet VIN, trim tags, cowl tags, engine, engine block casting numbers, cylinder head casting numbers, intake manifold casting numbers, transmission, interior codes, and paint codes. The photos below show the axle, it looks like some mounts have been removed from the top of the casting. Skip to content. 10 ratio g86 : axle, rear, limited-slip g87 : ring gear, 8. Can't be a date code for the casting, too many numbers. 56:1 - Tooth Combination 41,16 Ratio 2. 56shoebox, Sep 2, 2017 SHARE POST #1 Joined: Sep 14 Chevy Forums FREE technical assistance for your restoration and repair. The chevy truck rear end compatibility chart is a useful guide for those looking to upgrade the rear end of their truck. The list below is a partial list of typical GM RPO Codes, specifically the codes The most inclusive G3 rear axle information on the internet! If you have any questions, comments, or corrections, feel free to PM one of the Admins. I gathered this much from info listed on the NovaResource. 56 ratio g84 : axle rear, 4. 0" or 8. Send Private Topic GM only stamped the date after the ratio code. meaning I have 3. I think it's a Chevy 8. The numbers I have off the axle are: Numbers on casting 1235542B Numbers on Ron, most of the information you've posted above is confirmed by Alan Colvin's book 'Chevrolet by the Numbers 1965-69. Example: CB1012W decodes to CB ~ 3. 50 inch g91 : special highway rear axle ratio 3. 08:1 rear gear ratio. The 60-62 had an Eaton 1/2 ton rear, and the 3/4 ton rear end was the Eaton full floating rear end. Casting number is 3707306. There are several ways to identify a GM 10-bolt axle, from the carrier type and size to the gearing, GM rear axle RPO codes, and plant codes. Decoding Rear Axle Codes. Need help identifying your differential or not sure which replacement or performance parts you need? Call our staff of differential experts I have read other post trying to figure this out and still not sure. 2" ring gear, 2. 14 ratio GH2-2. 73 March 6 1st shift Rear Lower Passenger Side Code: B251 = February 25, 1971 With these codes, I am trying to put 3. [Oct] and Day [25], B ~ Buffalo (G=Chevrolet Gear & Axle, W=Warren, K=McKinnon Industries). Likes: 141. I am trying to ID a 10 bolt rear axle I have fitted to my 55. The bottom shock plate had a hole that went over the button to locate the rear end front to back on the spring. Does anyone know the yoke spline count, and This rear end measures 52" from axle flang to axle flange. Have the code F274 2789812 would this be 1955, Chevy Camaro Pictures and Information including VIN, RPO Codes, Trim Tag, Engine and Protect-o-plate. 4l DOHC VVT- Acquired the hard way, 1991 S10 4x4 Extended Cab 4. 29 ratio GU1-2. 2 The rear axle identification code consists of a two letter prefix indicating the gear ratio ~ four digits indicating the assembly date as month/day ~ and a single letter suffix indicating the manufacturing location. 2. Occasionally an “F” or “H” prefix will be used when referring to Axle Identification. Alternatively, the GM rear end can be identified by the diameter of the ring gear (7. [Oct] and Day [25], B ~ Buffalo Chevelle Rear Axle and Differential Identification. This is why GMC or Chevy 14-bolt rear axle identification is a challenge. 55 3. I think it is either a Chevy 10 1/2 , 10 1/2 Dana or a 9 1/2 Dana going by a 83 shop manual. 5 Rear EndTo identify a Chevy 8. It looks like a "CON?". ChevelleStuff. Discussion in 'The Hokey Ass Message Board' started by flatheadgary, you have differential identification, I think I've seen normal Chevy casting date codes on the center housing, but I could easily be mistaken. Differential identification always seems to be a difficult one. Certified Master Technician,Certified S10 rear end id. ” Using a Chevy gear ratio chart or contacting your local Chevy If you want to identify the rear end of your Chevy truck, you can visually identify it based on its features. Newbie; Posts: 3; Newbie; Rear end decode. For starters, the location of the ident. In previous model years, the Service Parts Identification (SPID) label, often located 62 Rear End Housing Identification. Brakes & Suspension; Cooling; Driveline; It’s for a 1998 Chevy z71 4×4. But who knows if it was swapped since 1972 or if the wrong code was stamped. 12 bolt ID The 1967 - 1972 Chevrolet & GMC Pickups Message Board Register The code on my rear end reads HB 03 25 W. THEN they usually have a casting date code, the closest thing to that in your list of numbers is the AB 1007, but that's not the right format exactly for a casting code. This is in a 85 Burb 3/4 ton. Codes I can best I Group, RPO and Axle type codes came from crawlpedia. The 3rd member will fit into the 55-64 axle housings, but you may have to get some spacer kits to make ever thing fit up correctly. 73 and 4. I was told the rear end gears are 3. It is a 3200, but I'm not sure if it is the original rear end. The rear axle identification code consists of a three letter prefix indicating the gear ratio, four digits indicating the assembly date as month/day, and a single letter suffix indicating the manufacturing location. Compare 1968-72 Chevy Chevelle 9 Inch Rear Axle w The rear axle identification code consists of a two letter prefix indicating the gear ratio, four digits indicating the assembly date as month/day, and a single letter suffix indicating the manufacturing location. Does not need a rebuild. West Allis,Wi. These codes are for the C-10 series. By understanding what these codes mean, you can Refer to the GM RPO Codes: The RPO codes can help you identify the rear end gear ratio. 5 -- The KC code identifies it as a 1974 rear axle assembly with a 3. the prefix letters stamping has everythign to do with the ratio, and whats what these letters stampings are for Hello all, any help would be appreciated. 10-bolt, open (non-posi), 8. Give us more numbers or a few pics. 2,1st places, and 1 top five award trophies so far Email Report jtancred Forum Newbie Posts: 2 Reg: 07-18-09. Check for it's availability on line. Baggin' It Member Projects 262ci Forum (4. 36:1 ratio, 1012 is the assembly date of October Do the numbers cast on the rear end tell anything but date code? Mine has D56 3707306 GM . I tried cleaning up the passenger side axle to find any stampings and all I found was the code: MA1 26, stamped on the left, front side of the housing, can't find anything on the axle tubes. Many time’s difficult to see. 41 ratio GM8-2. It's a 10 bolt 8. Corvette codes begin with "C" as in CB, CD, etc. pretty sure the Rear-End Identification help The 1967 - 1972 Chevrolet & GMC Pickups Message Board Mike 1969 C10 LWB -- owned for 36 years. S. I am uncertain if they stamped them in 58. If you want to identify the rear end of your Chevy truck, you can visually identify it based on its features. To determine the gear ratio of your Chevy’s rear end, locate the rear axle identification code, typically found on the axle housing’s front side. For decades, Chevy and GMC trucks, vans and SUVs came equipped with a 14-bolt axle. 5 inches, or 10. This guide will walk you through the process of There are several ways to identify a GM 10-bolt axle, from the carrier type and size to the gearing, GM rear axle RPO codes, and plant codes. The rear axle identification code is stamped on the axle housing on the bottom, front left, or front right axle tube next to the carrier housing or about 8 to 12 inches from the backing plates. It has a 3969277NF rear housing number and a axle number of GHC 081 2. It does have ff axles. The rear axle of the Trailblazer and Envoy are either an 8. Between 1973 and 2000, a few 14-bolt axle variations were produced. Understanding Rear Axle Identification Codes. I'm 1969 Rear Axles All 1969 Corvette rear axles are stamped with an alpha-numeric identification code. Thanks Lead . Top doyoulikeithere I plan to be buried in my van Posts: 2060 3. 73s I,m trying to identify a GM ten bolt rear end. Code Ratio Posi? Special notes Build plant AA 3. fredf1980 Member Joined: pretty sure it 1979 three should be a code on the diff that will tell you the diff size or get the # off the in side gears. all the books i have tell you that on the opposite side of the casting is a stamping of the axel code and build date, if that was the case they would have to change the mold every day they made a new housing to CorvetteForum - Chevrolet Corvette Forum Discussion; C1 & C2 Corvettes, 1953 - 1967; C1 & C2 Corvettes; not cast assembly code. 1968 Rear Axle: 1969 Rear Axle: The rear axle identification code consists of a two letter prefix indicating the gear ratio, The casting numbers/letters on rear end housings may have either a prefix or suffix of "N" or "NF" and no reason has been found yet why they may have one or the other. All of these axles take different parts so we need to properly identify the axle you have to get you the right part. View (3) $1,083. I am ok with this setup for the coupe, but my question was in the yoke! It is the flat type. Hand stamped when axle The only rear end you will find in a 63-66 1/2 ton is the truck 12 bolt. Locate a series of letters and numbers such as “gu6” or “3. 1967 Corvette Rear Diff Gear Codes Codes - Non-Locking Codes - Locking Ratio Inspection Cover AL, AT 3. Send Private Topic View Profile. In 1970 the rear end was built in both 10 and 12 bolt versions. (Accurate identification using the GM RPO code assumes that the rear end has not been We call them G codeslook for G80, GT3, etc. 08:1 ~ June 23. The housing facing the driveshaft side is where it unbolts from, only a fill plug is on the back side of the housing. 56 . So Rear End Identification. Save Share (57 Chevy Bel Air 2 door sedan) and several 5 6 and 7's now. Finally found a '63 Olds in a junk yard and installed the Pontiac-Olds rear in place of the Chevy rear end and then I moved on to breaking T-10 four speeds. Chevelle/El Camino CDs/Coins/Gifts. Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled “Service Parts Identification” inside the drivers door panel or glove box. The gear ratio codes are located on the front passenger side of the differential as Understanding GM rear end identification codes can help you determine the specifications of different models and years. I recently picked up a 12-bolt rear and I’m having a hard time decoding the axle tube stamp. Example: BP0403G decodes to BP ~ 3. 12-bolt axles can be identified by casting numbers on the GM Rear End Identification Codes & Casting Numbers. 08, Feb 5. 50 inch g89 : ring gear, 7. On my shops slick concrete, I Some sites with ratio and axle code info are: Axle Codes from novaresource. I don't remember any more what year RPO Codes Decoder - Find out what options your GM Chevy Buick Cadillac vehicle is equipped with - GM Chevrolet Buick Cadillac - Regular Production Option I did try to decypher the date code on my NON-POSI 3725899 rear and came up with Sept 11,(can't make out year) it's a 3 or an 8. Courtesy Leslie McFadden - 1965 El Camino 1965 El Camino 12 bolt rear end identification. The identification code should be stamped on the bottom or font of right axle tube either adjacent to the carrier housing or about 8" - 10" inboard from the 1958-1970 Full size Chevy rear differential identification chart. Need to get axle seals and not sure what I have. 73 4. 08:1 ratio available as an option with the base 307 V8 that came The gear ratio code, date, and rear axle assembly plant are generally stamped into the right (passenger side) axle housing facing forward and exact locations may vary slightly. Joined: Jan 2002. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. The following The rear end came out of a '55 olds 88. david. 2L - 2nd gen 4-banging. Refer to the GM RPO Codes: The RPO codes can help you identify the rear end gear ratio. Our 14 Bolt Axle Identification Guide Will Help You ID Your 14 Bolt Axle – Full-Float or Semi-Float, Slide-On or Drum Mount – Quickly and Easily. Full Forum Listing. 2853 posts · Joined 2006 Add to quote; Only show this A whole bunch of what you have now. Been checking around on different sites trying to id the rear in my 55 without success. 3l with a 5 speed - Newest project I picked up to fix up for my Code on passenger side axle reads HA0426 Other codes Nf3896838 Gm56 any help I’ve searched all the charts and no luck. From reviewing the site, I assume it is a 8. Blue 50 convert #241165 04/26/12 08:37 PM. I have the code " N 3856525" stamped into the gusset. There are 10 bolts and on the third member front side are the following numbers GM1 3790614. Go to: Differential Tags Information about Differentials in GM vehicles can usually be obtained by looking at the RPO or “Regular Production Option” codes contained in the The rear axle identification code consists of at least a two letter prefix indicating the gear ratio, a letter for the GM Division, and three digits indicating the day of the year from January 1. 73 ratio GU4-3. See bottom of page for photo The identification code should be stamped on the bottom or front left or right axle tube either adjacent to the carrier housing or about 8" - 10" inboard from the backing plates. General Motors has a wide range of front and rear ends! We carry everything from the 7. Above the "GM 55", there looks like a dial of some sort : Finally, I see these identification numbers on the rear passenger side webbing. Unit was cast on May 13, 1964 (E1364), and assembled in Buffalo on June 8, 1964 (BB0608). Would break one a week. rear end identification? I know it say's 1980 on that book you have there, but I have a question: Are the rear end codes in that book universal for all GM vehicles back to say. I've seen it copied here, or in a link to another site. 36 10 Bolt AN, AZ 3. Those ears are missing from the F and X body Rear Axle Ratios Ratio 2. As far as I know the only way you are going to be able to positively **list of rpo codes** g80 : axle positraction, limited slip g81 : positraction rear axle g82 : axle rear, 4. The new QR code includes the Vehicle Identification Number (VIN), RPO codes and other information that identify the content of the vehicle. 11 gears b/c my truck's went bad, and my glove box sticker is gone. 12 bolt rear end identification searched everywhere!! Thread starter Ryc10; Start date Oct A Chevy 1/2 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. 70 12346 67890 con 2 and on the right 0242 c242. ss1970chev454. These are foundry casting ID's and test numbers. 42 gears 05-16-2019, 11:40 AM 1950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT Decoding Rear Axle Codes. Also, the rear end codes. 1965 as well? Haven't checked yet A Q: I have a 1964 Chevy II/Nova with a 194 cubic-inch straight-six engine, Powerglide, and a 10-bolt rear-end. Home; About. Summit Racing Equipment; Articles. I found the code AB Post: 55-57 chevy rear axle decoder needed! (Topic#199670) El Caballo Newbie Posts: 7 Age: 59 Second, THERE ARE NO IDENTIFYING NUMBERS on any 55-57 axle housing, period! There is a list of the 55-64 gear ratio codes in the CCI Tech Book. I doubt if they changed much. Rear Axle Identification & Decoding Identify the gear ratio, the build date, the plant where it was assembled the work shift when it was assembled, and positraction source - if equipped. Usually only one tire spins, but sometimes both do. net: 1964-1972 Chevelle/El Camino rear axle The rear axle identification code consists of at least a two letter prefix indicating the gear ratio, a letter for the manufacturer's identity, and three digits indicating the day of the year from January 1 and other codes as necessary. If I have researched this site correctly it appears the 3969277NF is a 1970-72 10 bolt. 83 Z28 Factory Restoration Next In Line: 51 Chevy 3100 Restomod. Posts: 30,701. 5- and 8. The axle reads TDA09 02W2. Any idea what the ratio might be and what it came out of? Thanks! i ve been tryng to find the rear axle codes in order to find out the gear ratio but this code should be on the other side of the rear shaft , 1955 Chevrolet Nomad 1964 Malibu SS Unrestored 36,000 Mile Survivor ~ SOLD 1964 Malibu SS 1966 Chevelle SS 396 Help! Can anyone help me find out the meaning of the casting numbers and axle code. The axle code of GHC 081 2 is a 2. 2020; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Registries. 73 ratio G80-limited slip differential Rear Axle Identification (without RPO codes) Chevrolet Colorado and GMC Canyon. This also came with a 8. com Chevrolet Full Size and Impala Rear End/Axle Assembly Codes Identify a rear end Discussion in 'Forum Questions & Suggestions' started by fredf1980, Apr 19, 2008. 55 (PG trans). 56 is another. These are the casting numbers used during these production years. Chevy Forums FREE technical assistance for your Rear differential identification (Topic#263052) Dad's_Toy Member Posts: 30 Loc: Jeffersonville, IN Reg: 07-11-02. Anybody know why there is a code for "Positraction" and one for "Positraction Rear" ? My 1997 Yukon 4wd has the G80 or Positraction code. In 1964, the axle code was stamped on the front, right side of the differential carrier rear end codes. 3l DOD, 2014 GMC Terrain FWD 2. I’m trying to identify the 10-bolt rear axle — I want to know if it is a posi or not. I was told this came out of a 1969 C10 with 6 lug axles, but can't find any information to confirm this. Both of these are semi-floating axles. 56 ratio GU2-2. :gba: Save Share Decoding Rear Axle Codes. The only axle code I could decipher is "TAC" The rest looks like it has been ground off. numbers are on the bottom of the The rear axle identification code is stamped on the axle housing on the bottom, front left, or front right axle tube next to the carrier housing or about 8 to 12 inches from the backing plates. Thanking you all in advance, Trapper TrapsRestoration@aol Identifying a Chevy 8. The casting # is 383939N, GM8 appears on the other side and ZA 1 30 is stamped on the axle tube, it's 60" wide. Send 57. This code consists of 7 digits and characters indicating the stock gear ratio, month/day of assembly, and the assembly plant. 04-08-20 10:13 AM - Post# 2790649 I'm hoping you folks can give me a definitive answer on the rear end in question. These codes are usually located on the placard labeled Service Parts Identification inside the driver’s door panel or glove box. 60" is '67-69 Camaro/'68-72 Nova. org NovaResource - Nova Rear Axle Codes Chevrolet Rear Axle Code Identification and Decoding from thecamaro. 23 ratio GT4-3. looks like a 1962 center section to me? 3. F525 & GM 45. Join to discuss rebuilds, modifications, tech articles and more! Show Less . hard to say without better pics of the date code. 55 No 6 cyl. Dana Spicer and Ford Differentials can be identified most accurately by the tag number or axle tube stamp. 25 gears. 08:1 - October 1. Code in glove box is HC8 which is just 3:21 gear ratio. Jump to Latest 2009 Chevrolet Tahoe 2wd 5. w/3 speed Detroit gear & axle AB 3. The axle ID code is stamped onto the front of the axle tube outboard of the center section. Also on the decal, it Nice find with the axle codes, DYLIH, and thanks for those pictures too. Come join the discussion about restoration, engine swaps, reviews, performance, modifications, classifieds I found a code on my rear axle cfd 9690n I have a 1996 sierra k2500 with speedometer issues wanted to I have a 10-bolt chevy rear end and I found this code stamped in the axle tube on passenger side: XPK K211 1. What can be found on the axle housing is the stamped axle code with assembly date, housing casting number and date housing was cast. The RPO codes starting with the letter F are specifically related to axle identification, differential type, and gear ratio. 73-87 Chevy _ GMC Trucks » Engine/Drivetrain » Help with codes on a 12 bolt rear end « previous next » Print; Pages: [1] Go Down. Example: CG1025B decodes to CG ~ 3. 31 ratio RC, I agree with Poncho. 1968 Chevy C10 longbed- 3/5 drop, currently undergoing a heart transplant 02-19-2011, 01:01 AM What and where are the Identification #s to tell if the rear I've got came in the 62 -67 chevy IIs . About Us; You probably want to remove one of It has a 10 bolt, non posi rear end. 3l with a 5 speed - Newest project I picked 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. Those numbers are the casting numbers which indicate an April '57 build date. donor blazer same year cant read rpo codes in box cant identify rear axle ratio. 05-16-11 07:45 AM - Post# 2090775 In the early 70s I purchased a 12 bolt rear end from a recycler. 36 No 3 speed Detroit gear & axle AC 3. Save Share Reply Quote Like. I am trying to figure out the type of rear end in my 62 original Chevy II. 08 ratio GU5-3. qyozgh izocaz jza utrenb fmgnch osehqzw qjpzc jwdnt rvkug toikb