Gm 10 bolt identification numbers. May 17, 2003 · Quick question.

Gm 10 bolt identification numbers 10 bolts blow up all the time, especially if they've been in a 4x4 that has seen some action; could have been swapped with one from the boneyard. 2 versus 8. Oct 4, 2024 · A 4-bolt main indicates a block designed to handle higher performance and strain, appropriate for vehicles such as a Z28. A 10 bolt cannot withstand a lot of torque or heavy hauling, hence is not great for off-road use. One way to do this is by installing a limited slip differential. Cleaning with a wire wheel is not recommended as it usually makes the numbers harder to see *** Read more about GM RPO Axle Identification GM 10. 76:1 and down, 2 Nov 2, 2020 · This article will explain how to properly ID a GM differential carrier by examining your diff's ring and pinion gear set. 33 and up: Pinion Diameter Joined Oct 20, 2018 Posts 1 Reaction score 0 Location Colorado First Name Steve Truck Year 1970, 1976 Truck Model k30, blazer Engine Size 454, 406 Sep 27, 2008 · I couldn't disagree more. 90 / 4. A limited slip differential helps to distribute power evenly between the rear wheels, improving traction and preventing wheel spin. Top Casting Numbers: 12-Bolt Casting #3917124 10-Bolt Casting #3917123. Any help identifying this rear axle it greatly appreciated. 7digits and will start with a "3". Shortbed / Longbed Identification Truck Series Identification Bed Length Wheelbase (in) Shortbed78"115" Longbed127" 98" Oct 28, 2024 · Key Components of the Identification Numbers. 2" ED32118 : 2: 2. I ordered an Eaton Posi and a Motive Gear 3. Jul 22, 2015 · Chevrolet 8. i Jan 16, 2014 · I made some corrections here. Both of these are semi-floating axles. 5in 10 bolt axle G89-7. 83 to one i'm pretty sure i'm right but what does the 4 83 stand for i cannot find this info anywhere so it either isn't out Cover Bolt Count: 10: Ring gear Bolt count: 10: Ring Gear Bolt Size: 7/16 left hand thread TIP:(3/4 socket head bolt is left hand thread) Axle Spline: 28 bolt in axle 60 degree spline: Yoke style : U bolt & nut Universal joint retention (reference picture) Pinion Spline: 27: Carrier Breaks: 2. Casting numbers can provide information about the year the engine was manufactured and any modifications Mar 31, 2007 · I have a 69 camaro. 36:1 Positraction, 1025 ~ Month [Oct] and Day [25], B ~ Buffalo (G=Chevrolet Gear & Axle, W=Warren, K=McKinnon Industries). All of these axles take different parts so we need to properly identify the axle you have to get you the right part. The nomenclature actually refers to the number of ring gear bolts. Spline counts are different between the 12-bolt and 10-bolt so they will not interchange but you can put 5-lug axles into a housing that had 6-lug originally with no other changes to the rear end but the matching brakes. Therefore, you need be able to choose the more desirable 8. Rear ends with measurement designations are named after the diameter of the ring gear, i. Casting number is 3707306. 5-inch 10-bolt differential is just such an option. The only markings on the axle tube I can find are on the passengers side about 5 inches from the center casting - marking is 4EK053 That code doesnt seem to 1974 A and G Body Rear Axle ID : This chart applies to most GM 8. According to Nasty Z28, the GM/Chevrolet 12-bolt rear end was manufactured from 1965 through 1971. 625: Axle Shaft Diameter The identification code should be Casting Numbers: 12-Bolt Casting #3969278 10-Bolt a Positraction 4. 2-inch with open differential. Dec 13, 2011 · I think you're right Texas, it does look like a 7. 6-inch and avoid the smaller 7. Jan 30, 2011 · 10 Bolt Front Axle with 8 Lug The 10 bolt front is used for both 1/2 and 3/4 ton trucks, with only the hubs different for the lug patterns. It was too wide, and was replaced recently. Sep 12, 2013 · 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 is 8780100. It doesn't seem to have the ears at the 4 and 8 o'clock bolts, but there are slight nubs there, not sure if that helps. Example: CG1025B decodes to CG ~ 3. :flipoff2: 1969 Chevelle Rear Axle Identification 10-Bolt Casting #3917123. 5s and 7. May 17, 2003 · Quick question. 2" axle. 76 & down / 3. It is set up for coil springs. The numbers stamped in the axle tube are: 7FHO 236 The casting number on the center housing are b555771. 2 10 bolt. 73 gears. 960", and I know it's a Posi because it has springs and a clutch pack. Dec 10, 2010 · Here is my question (dilemma): From what I can gather so far, the codes on my rear end point to a 1970 Chevy Nova. is it possible to use this locker in a 5. The Axle tube stamping is: 2TX G 80472. The 30 spline axles have been shortened, and now use a bolt on keeper at the hubs rather than the c-clips. 5" Gm differential that is designed to have parallel leaf spring mounting to the vehicle. 08 gear in it. 2 10 bolt rear end in 1966. We should be able to get you in the ballpark from there. 12-Bolt Passenger - 2. Share. 25" IFS front end parts, to the large 11. Jun 25, 2008 · rear end identification Chunk type GM like 55 to 64 Can anybody tell me what this rear came out of? It is a GM 10 bolt with these numbers on the housing. A Chevy 3/4 ton pick-up may have a 14 bolt semi-float rear axle or a 14 bolt full-floating axle. I was told it came out of a 1967 Chevelle. 375, 28 Axle Splines. Jan 5, 2010 · It can only be a chevy 10 bolt, pontiac 10 bolt, Olds early 10 bolt, Or Buick 10 bolt We need pictures of the rear cover - If the rear cover has 1/2 round cut outs on each 3 and 9 O'clock Traditional BOP rear. 7/21/2016. Casting Numbers: 12-Bolt Casting #N3894939 (narrow early model year), #NF3917124 (wide late model year)* 10-Bolt Casting #3894938N * (Note: For what it's worth, ALL 67 rear ends I've ever seen were the narrow variety and used the spring cup like 68-72 but were narrower like the 64-66. It is 60" wheel to wheel. 5-inch 10-bolt was used in cars and trucks over a wide range of years. The year/model is what I was looking for. 73 to 1 but the owner believes this is a 4. The TR shows 68-69 Chevy series 10,4x2 3. 5-inch rear end with Positraction is a hero. The code will tell you what was originally installed in the housing, but nothing about any changes that might have been made since then. Oct 27, 2004 · The id's on the diff are 3894859 NF GM53. Customer: I have a GM 12 bolt rear axle. 29 @ 130. 5in 10 bolt Oldsmobile Cutlass Cruiser--Chevy 350-TH350 Jun 29, 2003 · gm 10 bolt id numbers. Ring Gear Diameter: 8. 23 / 3. Now I am trying to sell it and want to know its intended application. Btw if you need some 10 bolt parts ill sell'em to yah cheap. It definitely had trailing arm mounts cast into the housing and it had a 3. 2. The axel code is "TFA G119", the casting is "1254333", and the date on the differential is "D31" or April 3, 1971. My question is this. e. Compared to a GM 10-bolt axle (for example), a semi-float 14-bolt is a nice upgrade. Nov 12, 2019 · Hello, I'm looking to see if anyone can help me identify a Chevy 10 bolt 8. Narrowed 12 bolt 3. 5″ Rear-end How To Install Ring and Pinion Gears in a Ford 8. May 31, 2009 · It has a 3969277NF rear housing number and a axle number of GHC 081 2. 5″ 14-Bolt Go to: GM RPO Codes. To say that the axle and its inner design corresponds to the bolts on the cover is misleading. Dec 15, 2015 · I am sure this is a common question, but will admit I have searched high and low trying to figure out what the current rear end in my 57 Chevy PU came out of. Jul 2, 1998 · Ratio Month Day Plant Posi Source See Below: 01 = January 02 = February 03 = March 04 = April 05 = May 06 = June 07 = July 08 = August 09 = September The 10 bolt Chevelle rear end has the 8. When looking at a 12-bolt rearend, it is important to know that 12-bolt axle assemblies use different components for cars and trucks. 5" 10-Bolt. 1-ton has the Dana 60. I’m trying to identify the 10-bolt rear axle — I want to know if it is a posi or not. In 1970 the rear end was built in both 10 and 12 bolt versions. First appearing in the 1970 as a corporate replacement for the 10-bolt 8. According to General Motors, the first two letters (AC) indicate the Axle Ratio, in this case, 2. Evolution Across Model Years Jun 20, 2018 · I would ASSume that the later 81-87 (91) square body truck 10-bolt would be the same way. On the right axle tube there is casted "CFD" The rear measures 56" from left to right. side is (1385724) Anybody have an idea what this is. Also has a stamped number BA 317 and also says GM 8. The previous owner replaced the original rear with a 10 bolt posi rear with the casting numbers 26015047 with "4 H" cast above them. all the codes I could find are 1251502 K227 GM49. I do have photos of a June 1967 cast #3917124 rear end but Jun 2, 2010 · I have a 51 Ford F1 with what I think is a mid-70's Chevy Nova differential. 2 inch has its axles retained at the brake end of the housing and Jun 7, 2024 · How To Install a Limited Slip/Posi Unit in a GM 10 Bolt 8. Sep 8, 2012 · 3896839 looks to be from a Chevy/GMC truck ,your's would be a 68. Maybe there were other options, but he doesn't show themthe article above discuss upgrades to the small 10 bolt that might be helpful. 3 that I have and making new brackets n stuff. I also noticed a casting number on the front side of the pumkin as GM 73. After that, GM instituted the "Corporate" rear end, a 10-bolt rear end that integrated feartures of both the 10- and 12-bolt rear ends. It appears to be an 8. The 10 bolt Chevelle rear end has the 8. I know it's a 10 bolt because it has 10 ring gears bolts, I know it's an 8. Where do I find the casting number on the 10 bolt? the number I found on the rearend pass. The gear ratio would be beneficial too. 2-inch 10-bolt that saw use under certain Buicks,… The casting number, 3894859nf, identifies the axle as a 10-bolt from either a 68-69 Chevy II (Nova) or 67-69 Camero since both had the same casting number. I did some checking and found out that a chevy G10 van has the HI code, now I am trying to research if these vans came with an 8. It appears that the Factory 2. 73 set (which is supposed to fit a 3. It is a 10 bolt, Ring Dia 8. 08s. I know 11-41 is the 373 (GT4). Jan 30, 2017 · Q: I have a 1964 Chevy II/Nova with a 194 cubic-inch straight-six engine, Powerglide, and a 10-bolt rear-end. After some searching I found GM used these in some 70 - 72s like cutlass, GTO and Monte Carlos. Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled “Service Parts Identification” inside Dec 31, 2016 · I only mentioned casting numbers to quickly and accurately ID the correct 10 bolt I need. Trying to figure out what I have. I’m recreating a car from my past, it had Aug 9, 2009 · I have been trying to ID a GM 10 bolt rear end I have. The Chevy 10 Bolt Rear End can be upgraded and enhanced to improve its performance and durability. 5s look remarkably similar, so you’ll need a measuring tape to confirm. Mine came out of a drag car and has been narrowed, which removed the stamp marks on the tube. We make it easy to verify your exact rear end by providing specs and year, make, and model applications for 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. As the name implies, GM 10-bolt differentials will utilize 10 bolts to secure the differential cover to the carrier. Nov 9, 2009 · GM10 bolt ID number decoder? Jump to Latest 4. Jan 30, 2015 · A Chevy 1/2 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. The Pontiac 8. Mar 13, 2018 · While the 10-bolt rearend’s lineage can be identified by the code stamps, which are usually on the passenger’s side axle tube, there are hundreds of potential codes for the three different 10-bolt rearend housings. Axle Type Casting No. The part number for the 10-bolt yoke, for all three years, was 3878968. GM built countless thousands of both types of 10-bolts from 1970 to 1994. I'll try to check the Cover Bolt Count: 10: Ring gear Bolt count: 10: Ring Gear Bolt Size: 3/8 Fine Right Hand Thread (11/16 socket headed bolt) Axle Spline: 28 bolt in axle 60 degree spline: Yoke style U bolt & nut Universal joint retention (reference picture) Pinion Spline: 27: Carrier Ratio Breaks: 2. On the support nracket from the diff to the axle is the code "J231". 4K views 8 replies 5 participants last post by fast68 Nov 13, 2009 Oct 5, 2022 · The later model GM 8. On the rear of the axle housing next to the differential is says "67890" upside down. The number of bolts on the cover is coincidental. 07 to 3. 438, Bolt Dia . I've searched a lot of blogs and websites to find this code but haven't come up with anything yet. 78 / 2. 5 inch 10 bolt rear end: To make a '99 (I think) or newer Eaton Posi work in an older truck (like my '91 Z71) use the following bearings: Sep 13, 2010 · Gm 10 bolt rear end identification Discussion in ' The Hokey Ass Message Board ' started by hbomb60 , Sep 13, 2010 . I would like to use this axle in my 52 if it's a 8. see attachments below for pic. The 10 bolt housing number is 3969277. 2 Chevy-style has a round cover with an indentation running across the cover (like the 12-bolt Chevy) and 2 casting projections on the top of the rear. 08, 3. id like to know what gears i have. For example, there are ten bolts on the GM 10-bolt and 8. Nov 1, 2019 · well, thanks for all the replies. 2 Pontiac 10-bolt has 2 scallops (cutouts) on each side of the rear cover, whereas an 8. 2 carrier and ring and pinion. Chevrolet used its own 8. 10 & up; GM Carrier Casting Numbers. The easiest way to tell if your truck is a 10 or 20 series truck is to look at the bolt patterns on your wheels. I looked at a lot of these links. Also there was no carrier or ring and pinion just the housing and some casting numbers on bottom right looking from the rear A41, top left same direction 12345, bottom Casting Numbers: 12-Bolt Casting #3859140 10-Bolt Casting #3859139 10-Bolt Casting #3863495 * 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. Joined: Aug 26, 2005 Can anyone tell me where to get all the ID numbers off a 12 bolt rear end. 83 gearing. 73 - 1. 2 Camaro 10 bolt should have casting number 3894859NF See this ink for how to tell difference of 8. 5" ring gear was used in Chevelles. 2 10 boltand the casting number you list matches the info for the 10 bolt. Any help would be appreciated. Also check for the casting date code as shown in THIS LINK. Reading them upside down with a flashlight, on the right front side, as you face forward, "GM32" Then on the right side of the axle tube also facing forward "1254333" and lastly on the right side up on the differential May 16, 2024 · 3. 2-inch or the 12-bolt 8. 2-inch 10-bolt Camaro housing, the casting number will be 3894859NF. 5" The codes found on the diff:-GM30-D209-1254333 (could not locate any codes on the axle tubes) You might be asking yourself what gear ratio is best for your GM 10 bolt. From that, I know that it came from a 1967 - 69 Camaro. 5 - check size of the pinion nut. 2 from an 8. Engine is DMA 81 350 Impala 175 LM-1 TH 350 4-Brl DMA 81 350 Camaro 190 LM-1 TH 350 4-Brl The identification code should be Casting Numbers: 12-Bolt Casting #3894860 10 Data presented here has been gathered from various websites and GM's Dec 8, 2018 · Wondering which GM 14 bolt axle you’ve got under your rig? Over the years, there have been millions of 14 bolt axles produced. The following is a guide for helping a potential wrecking-yard shopper and Mar 25, 2016 · First, look at the casting number of the center section. The difference is an 8. I think I tracked down the axle markings though (ACK). Sep 23, 2009 · 3894939 1968-69 Chevelle 12-Bolt Axle Center Section Casting Number 3852980 1965-69 Passenger 12-Bolt Axle Center Section Casting Number FX 0203 G1 Decode: FX -1969 Full-Size Passenger Posi 2. 2 unit, as the information doesn't follow GM coding correctly to match an 8. But an 8. The picture of the rear end I have has the "eyebrow" shape which every link says it's a 8. 07 non-locking. 1969 X66 396 LeMans Blue, M20, 373 (Sold) Feb 19, 2016 · How can you identify a 373 10 bolt 6 lug rear end 9. The number read as follows: BR3 G147 2. 8 Inch Rearend Dec 19, 2013 · I looked in Colvin's book and couldn't find a listing for a rear smaller than the 8. By Speedway Tech Team. The gear ratio for a GM 10 bolt is 10,41. This pinion yoke - also used in 1970 - was part number 3954393 (number on the part is 4394). 90 posi ; 10. 5" 10 bolt rear end identification vs 8. The only numbers/letters I’ve found are cast in the center section. Jump to: Driveshaft | decoding | ring gear identification | Speedo-gears Camaro Rear Axle Information The 1970 rear end differs from the 1971-1981 rear end. The numbers on the axle read CRW0152 I would like some help identifying the year, would like to rebuild seeing it was free. Tried search the web, but not able to narrow down year, gear ratio, etc. yes jim, the ab number is stamped and the other one is cast into it. Apr 1, 2021 · The HO 72 in my friends 58 Chevy 1ton is 5 lug [floater] The HO 72 and 52 diff heads are interchangeable [bolt in swap] ,the only difference is early [17] and late [30] axle spline counts. 73:1 & down May 10, 2009 · I just got what appears to be a 1978 Nova 10 Bolt. 08:1 Open; G is Detroit Gear; 8047 is not defined on any Nova web site - I assume that it is 8 for 1978 and 047 for the 47th day of that year (Feb 16); the 2 should mean second shift. In 1971, GM instituted a standardized "corporate" rear axle. 2 10 bolt had their own round 10 bolt rear cover with a splash lip on it. This stamp can be difficult to locate on an 30+ year old axle due to layers of paint, undercoating, grease, and dirt. The pinion is the same diameter as the 12 bolt, but the 1972 rear end will have the weaker 28 spline factory axels unless that is an aftermarket Eaton posi in the rear end you bought that uses the 30 spline rear axels that were also used in the 12 bolt. B is for Buffalo, NY. the 12 bolt housing will be 3969278. 625- and 8. Oct 18, 2024 · How to Identify Chevy 350 Engine Block Numbers. 5" 14 bolt rear [so the PCD can be changed easily] Aug 2, 2009 · I've got a 10 bolt rear end that I picked up and I'm having trouble figuring out what I have. 5 but gears not interchangeable with chevy 10 or 12 bolt I have a 72 Monte with7. Sep 14, 2020 · Aug 13, 2006 · The 3969340NF casting was an 8. Sep 20, 2013 · It is a 10 bolt open with 2. Mar 30, 2006 · I can tell you it IS NOT a Camaro axle, as the ID stamp doesn't match ANY generation Camaro numbers, with the following information your axle most likely IS NOT an 8. GM 12-Bolt Car: 2. Well if you take a look at the Jimmy in my signature, that is my rig. 36- 4. Apr 13, 2018 · After 1972, General Motors was only installing its 10-bolt rearend in cars, but the 12-bolt remained an option for trucks until 1987. For the 1972-75 Camaro style model 8. Looks to be all factory original never disassembled. 5- or 8. The only casting numbers I can find are "69" and GM 12 235542B. The only numbers I have found so far are GM84 and Dec 24, 2020 · Before GM consolidated its rear-axle production into what became known as “corporate” axles around 1971, each division placed its own versions underneath the passenger cars it produced. can you tell me what ratio this is? this axle had a locker of some sort in it, i believe it was the trc loc, or gov loc. Nov 7, 2024 · I’m trying to Id my 12 bolt rear end in my ‘64 c10 step side half ton. There are 10-bolt carriers with 9, 10, or 12 bolts on the cover. Chevy 8. Identifying the 10-bolt axle is easy. Just finished grinding down all the rust and finally found some numbers stamped. The numbers that follow supposedly indicate the the number of days from the beginning of the year. A 12 bolt, on the other hand, is built to handle heavy torque and off-road The fourth and fifth numbers indicate the month of production. 5" ring gear. What Is The Difference Between A 10 Bolt And 12-Bolt Rear End? A bolt 10 is simply not as strong as a bolt 12 and that is the simplest way to answer this question. The 350 CID SBC engine, particularly with a casting number such as 140029, is recognized for its 4-bolt main setup. So, looks like I have a 1970 Nova 10 bolt 8. Might be 66-67 there narrower than 68-69 look for casting numbers on center section . 2 10 bolts took their own style chevy 8. This 10 bolt housing is dated K 22 7 , (November 22, 1967) for an early 1968 model year car and it is stamped PE 1204G1 E. GM documentation for 1972 does not Aug 16, 2017 · I have a GM1 12-bolt rear end with the same casting number. If it is truly a 72 unit. 2" ring gear, 2. So it seems I'm back to measurements than to ID the correct 10 bolt. The 2TX decodes to 1978 Nova 3. 36-4. Considering it should be a 10bolt, and you're showing a pic of a 10 bolt, and you're looking for 10 bolt parts. They came out of a 79. The GM / NOVA Forum suggested I try here. The casting number is later than the documented 65 10-bolt and earlier than the documented 66 10-bolt. 2" Posi Carrier. Thread slip differential G87-8. This rear end was available in a 10 bolt version only. Like if you see 12 bolts on a Chevy rear (c-clip retained axles) it is a 12 bolt ring gear on the inside carrier. One way to tell the 8. 2", Pinion Dia 1. 08 or higher axle). Nov 4, 2010 · This number is stamped on the forward facing passenger side axle tube. Here are some visual indicators for different Chevy differentials: – 8. Apr 21, 2005 · GM 1/2 ton truck posi (complete carrier) into my '91 Chevy Z71 1/2 ton 8. 5. Thanks Marcus GM / Chevy - Differential IdentificationShop by your differential. 398), for 1967 67 1968 68 and 1969 69 Camaro and Nova. Like Superman in street clothes, however, it can be hard to identify this beefy unit among its weaker cousins, the 10-bolt, 8. The sixth and seventh numbers indicate the day of production. The casting numbers/letters on rear end housings may have either a prefix or suffix of "N" or "NF Jul 4, 2002 · I have a GM 10 bolt rear end, suppossedly from a 69 Camaro. 1970 Chevelle Rear Axle Identification 10-Bolt Casting #3969277. On the Ring gear are the numbers: 1 CM 3910823 15 41 4 67 I heard from someone that the 15 means the number of pinion teeth, and the 41 means the number of ring teeth. axle code says it is 2:73 open. The numbers I have off the axle are: Numbers on casting 1235542B Numbers on axle tube JAG1092 Other numbers on casting GM16, AND D183 May 24, 2011 · What is the casting number on the center section? The 8. 2" ring gear from 1964 to 1972. 875-inch, the 8. It wasn't until late 1972 that the 10 bolt 8. 33 and up: Pinion Diameter Nov 2, 2020 · This article will explain how to properly ID a GM differential carrier by examining your diff's ring and pinion gear set. The GM 10-bolt is named for the number of bolts on the cover; ring gear diameter is 7 1/2 inches. You need to be able to accurately identify the GM 10-bolt. Dec 21, 2006 · You did not specify if it was a 10 or 12 bolt housing or if it was original to the car. Now it has a weird rear cover that looks like a 10 bolt 8. GM 14 bolt axles were available in semi-float and full-float versions, and there are two types of hubs found on 14 bolt axles. Usually only one tire spins, but sometimes both do. The identification code should be stamped Casting Numbers: 12-Bolt Casting #3969278 10-Bolt a Positraction 4. The eighth letter indicates the assembly plant. Jan 18, 2009 · I know it's a 10 bolt open rear with "GM53" stamped on one side of the carrier and "3894859NF" stamped on the other. Jul 19, 2015 · Last year I purchased an "old school" 1936 Chevrolet Master Deluxe Street Rod and I'm in the process of making clean-up mods to it. GM 10-Bolt Polished Finned Aluminum Rear End Cover Installation Guide Feb 23, 2010 · It would have to be a late 65, not a 64/early 65. These differ based on the gear ratio. On the front of the right axle housing is the code "JD G308 1". 5 inch. This gear ratio will allow the engine to turn 10,41 times per minute. It has an E under that # It has 6 bolt axles, so it should be a truck of some sort. Feb 14, 2017 · Good morning all! Having difficulty identifying the rear end I'm rebuilding. Jul 7, 2006 · Casting on rear housing can be unreliable and best to phyically check the rear out. The 8. 73 and lower ("lower" gears = higher numbers, like 3. com website. 11" high x 10-1/4" wide. Apr 4, 2006 · I picked up a GM 10 bolt and I think it is an 8. Apr 6, 2019 · Thanks, it sure drove like 3. 2 gm 3984825 5 41 10 71. Dec 7, 2011 · I have a 1984 Olds Ninety Eight. The center casting number is 3969277 which an internet search indicates is from a 70 to 72 A Body. May 6, 2015 · It's a 10 bolt, at the widest width it is 10 5/8", the pinion nut is 1 1/4". Pics are attached. 08 Posi Rear Axle Housing with Rear Cover and Axles, (GM Casting Number 3894859, GM Group Number 5. 05-30-12 10:27 PM - Post# 2231717 In response to fear30x '95 will be 30 spline but don't assume the rear is original. The previous example was cast in February 1965. 625 rear end. If I have researched this site correctly it appears the 3969277NF is a 1970-72 10 bolt. wilma Aug 24, 2001 · Rearend Quick ID - An 8. The identification numbers for the 454 engine usually consist of two main parts: Casting Numbers: These are typically found on the engine block and indicate the specific design of the engine. 5/7. 56-2. Jan 30, 2017 · Casting Numbers No I did not. 2-inch Chevy 10-bolt: Look for a pair of long flat areas on the front side of each axle tube. I am pretty sure it is a 10 bolt 8. The stamp location is illustrated in the sketch below. The axle code of GHC 081 2 is a 2. either way, you all have given me what i expected. 10-bolt, open (non-posi), 8. If it is an early 8. Identify specs, details, and identification information on Chevy and GMC 4x4 front axles. (1966 is what the K116 number tells me) Jan 3, 2023 · Not an 8. Upgrading and Enhancing the Chevy 10 Bolt Rear End. If the ID tag or stamp is missing or unreadable, differentials can be identified by the number of cover bolts, the distinctive shape of the cover, the number of ring gear bolts, and ring gear diameter. 5" rear end parts for 1-ton trucks. 5" 10 bolt but I don't think it is. Can you help me decode my rear axle numbers? Casting number is J89, founder CON1, test marks 67890, other test marks are 12345, the number on the front of the passenger side axle is C BP 1017 G1. 08, 0403 ~ Month [April] and Day [03], G ~ Detroit Gear & Axle. GM documentation for 1971 Jul 21, 2016 · Axle Flange Identification. Please select a rear end that matches your vehicle below. 11 gears. 88 98 Chevy Truck Rear End Swap Aug 20, 2009 · Been checking around on different sites trying to id the rear in my 55 without success. 2" It has to do with the diameter of the ring gear. 2 and 8. Whenever possible, reference the tag numbers when ordering parts for your Differential. 5" axle housing has two squared ears at around 5 and 7 o'clock at the bottom of the casting that are easily seen and large. I am not sure if it is true but I heard 82 was the last year that they put a 12 bolt in. I was told it came out of 69 Camaro. Mar 8, 2011 · The casting number is 3959038 which is a (late) 1969 Chevy 12-bolt. What do they all mean? Thanks. Series Gearing ; 10 bolt 8. GM CORPORATE 10-BOLT This 10-bolt, with a larger 8 1/2-inch ring gear diameter, replaced the Dana 44 that was used in the front of some pre 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. There are 12-bolt carriers with 10 and 12 bolts on the cover. 73, chevrolet built on the 81st day, 2nd shift. not sure what is original on this, but it has a type 4 carrier with 4. Compared to the 14-bolt full-float axle, the 14 bolt semi-float has a smaller ring gear (9. 05 is for May. Same with the chevy 10 bolt cover it will have a 10 bolt carrier also. 10 gears. 1958-1970 Full size Chevy rear differential identification chart. 8 Rear-End How To Narrow a Ford 8. However, the numbers I found on the ring gear, tells me that someone changed the ring and pinion gears to 4. Therefore, look for the part number, it will be in the web facing forward. General Motors has a wide range of front and rear ends! We carry everything from the 7. 2 10 bolt rears axle tubes neck down on the ends, as the axles are are retained with c-clips inside the carrier sand do not have flared out axle tube ends. 5″), and the axle shaft can not be removed without also removing the wheels. 5 size? Nov 30, 2016 · If it is A 12 bolt BOP they had 8. and the front axle has an 8lug so would that mean I have a. 000_0340. 23, etc. 25 inches. We make service and repair easy when you use our online resources and expanded views. 2" in diameter, I know it's a 3-Series Carrier because the deck height measures 1. Still, the 14-bolt semi-float is a solid axle for a lot of applications. It's an 8. 73:1 ratio. Here's a couple of pics Here's what I read from a camaro website "The casting number, 3894859nf, identifies the axle as a 10-bolt from either a 68-69 Chevy II (Nova) or 67-69 Camaro since both had the same casting number. 5-inch 10-bolt was used in many different models by every GM division (with the A wire brush can be very helpful in the search, as can a putty knife and lacquer thinner. 2" because the ring gear measures 8. i will just say it's '56 chevy and then i will have napa look up the numbers on Aug 31, 2008 · Re: 8. 25, and twelve bolts on the GM 12-bolt rear end. The ninth number indicates the plant shift number, 1 is for the day shift (if present). The center section casting number for a 12 bolt is 3894860NF while a 10 bolt number is 3894859NF maybe that can help if you get the casting numbers. 2" differential has a housing that's shaped round, just like the cover. Attachments. Your axle code given translates to a 1971 and later axle code standard: Mar 20, 2011 · well i always thought i knew how to read the numbers but a recent rear end has puzzled me and i need some help the numbers are as follows 41 15 4 83 now i thought this to be a 2. The approximate location is same for both 10-bolt and 12-bolt axles. It is a 7-digit number that indicates the engine’s production year, plant of manufacture, and Jun 19, 2005 · the PG could have been used in a number of cars and relates to a 3:36 gearing to a 3:07 and a 3:08 that I found so far. This gear ratio is ideal for off-road use because it provides plenty of torque and allows the vehicle to travel at high speeds. 5 is by the ring gear bolts. And, of course, they weren’t all the same. Any help would be greatly appreciated. 5 because it has the triangular nubs on the bottom. 13 application? 3 GM 3977334 10 41 10 77' Sep 13, 2012 · It came in my 1968 Firebird, and straight away I knew it was the wrong rear end. There is also a "175" casting. 10-Bolt Identification. Compare your housing with the pictures on the NOVA AXLE SITE and it should narrow it down a bit. GM8 0138 3725899 . When i purchased it I asked for a 67-69 Camaro axle. All 12-bolt pinion yokes have 30 splines, while 10-bolt pinion yokes have 28 splines. Along with shop manuals and replacement videos, Torque King 4x4 is the number one resource for Chevy front axle differential identification charts and tools. I crawled under the truck and found three numbers. 93-3. It has RV 0306 W 2 stamped on top of Passenger side axle housing. 5 GM: Ring Gear Bolt Size: 7/16 Left Hand Thread: Axle Spline: 28 c-clip & bolt in: Pinion Spline: 30: Pinion Diameter: 1. Casting # XXXXX and NF3896839 on center housing. Gm51 some other coding and con2 more unworthing coding to the factory needs. it's pretty dirty so there may be other numbers to. The housing is 54 1/2" from the outside of the flanges, 57 1/2 Mar 19, 2006 · I know it is a chevy 10 bolt w/ 8. I gathered this much from info listed on the NovaResource. So far I know it's a GM 10 bolt 8. The driveline is hooked up to a 1969 Powerglide automatic trans and a Chevy SB V-8 307cid, 200hp engine. Also the Eaton Floater Hubs/Drums/ Brakes are a direct bolt on swap with the later model GM 10. I’m vacillating between new axles for this one and bolt it back in or narrow the Olds 9. " Mar 26, 2020 · In 1969, a 1310 u-joint was used for all applications, and it was attached with straps and bolts. This is not the same as the car 12 bolt. 2 10 bolt used in early 70's Nova's. I know to count the bolts on the cover but how do I find out by the numbers if it’s a 9. 2-inch 10- and 12-bolt axles, while the other divisions used various other axle designs, including one 8. 76:1 and down, 2 Jun 17, 2013 · I am trying to ID a 10 bolt rear axle I have fitted to my 55. It's not a Chevy Rear, the area on the Housing where the tubes inter is what threw me, Cover also looks like a Buick or Olds Rear, probably a B-Body. 5" axle. i pulled the cover and found these numbers on the outside of the ring gear. There are no ID tags anywhere. NOT CHEVY-If you have BOLT IN axles AGain NOT a chevy rear Sep 26, 2020 · 12 bolt identification. Add Article To List. Should also be more numbers on opposite side of Webs, Casting#. Chevy 350 engine block identification numbers are generally found in several key locations: Casting Number: This number is typically located on the rear of the engine block, near the bell housing. The pan hard bar bracket is located on the passenger side axle tube. 5 10-bolt axles Aug 24, 2001 · Rearend Quick ID - An 8. For a First Generation Camaro the measurement of backing plate to backing plate should be about 53. Also, two different types of drums were used. 2 rear end housing. Jan 6, 2009 · The ratio code is usually two letters (sometimes 3, sometimes a number & 2 letters), and is found on the right-hand axle tube. Visual identification: If the differential has been modified or the identification tags are missing or unreadable, you can visually identify the differential. Sep 4, 2024 · To determine the type of rear end in your Chevy truck, you can consider the number of bolts. Aug 17, 2006 · I have a 49 Chevy pickup with a GM 10 bolt rear end The number on the rear end is GM K11 8725899 Is there some where or some one that can tell about this rear end? Maybe the the year or what this rear end came out of. 7. On the other hand, a 2-bolt block might be more common in general applications. It measures 53" back flange to back flange. Dec 10, 2004 · 1 GM 3992484 11 41 5 73 these are the numbers i pulled off of a gear set in a 14 bolt at the local junk yard. Dec 1, 2015 · 10-Bolt Identification You need to be able to accurately identify the GM 10-bolt. For the axle to be a 12-bolt for a 67-69 Camero the casting code would be 3894860nf, which is also the same casting number for the 68-69 Chevy II. Jan 30, 2016 · The GM 10-bolt is named for the number of bolts on the cover; ring gear diameter is 7 1/2 inches. 5 rear end. There should also be a seven digit number When it comes to getting power to the pavement, GM's 10-bolt, 8. 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. The casting numbers/letters on rear end housings may have either a prefix or suffix of "N" or "NF Apr 28, 2009 · I'm shocked no one has asked you how you got a d44 in the front of a 79 chevy. Chevy has employed four different 10-bolts, with four housing configurations, for musclecars in the last 35 years. This is for a Good Used Original Chevrolet Camaro 3. I need to replace the pinion seal and the size doesn't seem to line up. I’ve searched the entire axle for markings, there is no tag or stamps on any of the axle tubes. 2-inch units. Casting Numbers: 12-Bolt Casting #3917124 10-Bolt Casting #3917123. 2 inch has its axles retained at the brake end of the housing and How To Do 1977-1991 GM 10 Bolt Front Axle Identification: Type: Iron beam 4x4 Front Drive Axle Front Cover: Oval with 10 Bolts. The numbers on the ring gear stated 3. Dale has a typo for the 65 10-bolt; should be 3859139 (1 digit lower than the 12 bolt), not 3959139N. Differentials that feature Positraction will have a small identification number comprising two or three digits, located on the lower right side of the differential cover. The Differential in this car is a 10' bolt, 8. 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. pdf. The third letter (K) designates manufacturer; GM of Canada. Unlike the Dana 44 Diff Cover, the GM 10 Bolt Cover does not have any flat sides. 5-inch 10-bolt casting numbers we’ve found a 410409N and a 410408N. I WAS MIS INFORMED. 18 is for the 18th. Trucks with 5 or 6 bolt patterns are 10 series, trucks with 8 bolt patterns are 20 series trucks. Jul 17, 2024 · Identifying a GM 10-bolt rear end housing requires measurements, locating casting numbers, and knowing what to look for. The photo of a 1969 10-bolt axle stamp (PG0424G1) is taken from below the driveshaft, looking toward the passenger-side leaf spring. It'll usually be about 3 inches away from the carrier housing (center section of rear end housing). Sep 5, 2012 · Hey Guys I need some help ID'ing this axle I've got a GM 10 Bolt i'm trying to identify. 10:1 rear axle ratio. Additionally, you can use the gasket size and shape to identify all Chevy truck rear-ends compared with an identification table. I just bought my 85 and it has a 12 bolt in it. these numbers are on the face of the diff by the bolt holes. 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. Can anyone id this rear Apr 25, 2010 · Rear Axle Identification. Count the number of bolts that secure the differential cover. Variations of this can be found in the rear of GM S-trucks and some Isuzus, and in the front of S-trucks. 56:1 (large ring gear) 12-Bolt Axe; 0203 - February 03, 1969, G - Detroit Gear & Axle Plant Code, 1 - First Shift (Daytime) Jun 9, 2020 · I have a 10 bolt rear that I think is from an early Chevelle but it could be something else. ) go on the 3 series carrier. Example: BP0403G decodes to BP ~ 3. mxbtv inqnap lozk vqwez qqq uznmarq cqpwbo qdgnv qapxz cayfa