Impala 12 bolt codes. I know the difference.
Impala 12 bolt codes Get the best deals for 1965 impala 12 bolt rear end at eBay. 73 10 BL 3. 11 in aftermarket). 00 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. 56 : Yes (this code only used for 1969) Eaton : EH : 4. That looks to have a july 7th of 1966 date code. 56 10 PC X 2. Mar 17, 2009 · Hey, I've a 67 Impala and i'm wondering what gear ratio I have in the 12 bolt axle. Nov 15, 2024 · Complete 12 bolt Impala rearends are available upon request . Open carrier with 2. Apr 15, 2015 · I would attempt to buy the brackets (I think I remember them being $75 per bracket and you will need four to bolt it up) before I would attempt to torch the old ones off your rear end that I would include with the future sale of the car (some folks will pay extra for a numbers matching and date code correct car). 1966 chevy impala 12 bolt rear Re: '65 12-Bolt Rear End Identification 05-25-05 08:23 AM - Post# 704181 In response to WhiteElephant WE, You can ID the rear by checking the code - typically located on top of the passenger side axle tube. Not worth the Jul 12, 2011 · It is 40% stronger than your 8. Take the bolts out, and the three electrical connections and wiggle the TCM out. alxe GK1113G2,GM2,389486NF. View attachment 165351 Mar 5, 2010 · The 1965-76 Impala 12 bolt had coil springs and four parallel control arms with a Panhard bar to center the rear end. 08 gear ratio is a 10-bolt ratio, the 12-bolt is 3. 31 12 BT X 3. Sportsman XFI Oct 4, 2007 · Which is attached to the carrier by 10 bolts (this 8. Impala has a different pattern to bolt backing plate to. I have a 67ss396 chevelle with a factory 12 bolt rear. 5" 10 bolt ring gear is not the same as the 1971 and newer 10 bolts). 875 in. From the backing plate to the axle flange where the wheel bolts on is 3 1/2" on each side. 2L LSX with 4L80E, 3. 12-Bolt Casting #3969278 - very early 1970s have been reported with #3959038 units. Save Share Sep 23, 2018 · A different 12-bolt differential was used for light truck applications, but those 12-bolt units are not directly interchangeable. 08 posi 10-bolt May 19, 2003 · Rear Numerical Codes Code Positraction Ratio 10 / 12 Bolt BA 2. 10 posi) Best offer locally I could get was 1200 bucks. The 1977-'99 Impala used a pair self centering 45 degree upper control arms with parallel lowwer control arms and had no Panhard bar. Our 1965-70 Impala 12 bolt 04-19-20 06:12 PM - Post# 2791561 In response to Cleatus I see no reason why that wouldn't work. 55 12 BO 3. Dec 31, 2023 · What does the "1" mean in my Axle assembly code? According to NR, the 1969 Coding is: Ratio -- Month -- Day -- Plant -- Posi-Source The "Posi-Source" codes are Letters, but I have a Number "1" I also saw note "[ if no posi-source code, then it is not posi ]"-- But doesn't the BT code tell that it IS Posi? BT= 3. 31 posi 03 = march 31 = 31 st G = Detroit gear and axel E = Eaton posi I am pulling the posi unit, ring and pinion. Assembly date 0413. 73 and up to a 6. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Mar 22, 2006 · Author Topic: 12 BOLT DATE CODES (Read 8512 times) tyrfryrtom. 00 1970-1981 Camaro 1968-1972 Chevelle 12 Bolt 30 spline 30-1/16" Moser Axle Shafts (Pair) $319. 10 posi 12-bolt CPA - 3. Dec 23, 2010 · Looking at some power team charts from Chevrolet for 1970, 1971, and 1972 Rear end gear ratios for wagons are only affected in the L6 and 307 engines and these are 10-bolt rear ends. The rear end was roughly 58 1/2 from flange to flange, I had thought it was out of an impala or truck due to the large trailing arms and lack of coil spring mounts. This greatly increases strength and Nov 24, 2016 · It's 4wd its a 12 bolt posi which wasn't offered in 85. 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. might check date& cast #'s just to be sure Jan 30, 2012 · I have an extra 10 bolt out from under a 65-66 Impala. I know it is not a Camaro rear, but it would probably be a good one to build for a non matching car or someone that wants a 12 bolt in their car. Ratio Month Day Plant Posi Source CBW - 4. P0128 (it throws this every now and then just for shits and gigs), P0620, P1189 and P1811. 6 cylinder engines are stamped on the passenger side of the block behind the distributor. 65-70 B body, Impala 12 bolt rear end housings interchange. 875 inches by 10. The ring gear is closer to 8. 88 12 PA 3. Replaced all bolts/studs with grade 8 bolts and washers (flanged bolts unavailable). All use 28 spline axle shafts except the 1967-1968 models originally equipped with 3. This rear wind was pulled from an Impala SS many years ago. Jun 30, 2020 · Update on this project for anyone interested. 90 I would say with a glide you have 2. Order one today and bolt in a bullet-proof 12 bolt rear end for your 1965-1970 GM B-Body Impala, Caprice, etc. 6, short term trim 0, long term -5. Jul 3, 2007 · If you have a Camaro/Firebird/Nova rear end with the correct brackets welded on it to bolt up your rear into your car it will be 3. 438 inches versus 1. Once you get the cover off, my advice would be to find a system to keep track of the bolts you take out of the TCM. 31 ratio, not posi. I am currently funning 245/50/16's on 8 inch wheels with 4 inxh backspace with a factory Camaro 12 bolt on my 68 vert with no issues. But as stated you will need to axle code 2-3 letter suffix code or you can open the rear and check the pinion head it will also have the ratio stamped into it by listing the ring tooth count and the pinion tooth count and part number of the pinion gear plus the date usually. Give it a week or so and check it again. I don't think It will fix it i just hope it fails before the warranty is up. May 27, 2010 · The 12 bolt three series carrier (casting number 30140PM1) supports gears from 3. Nov 12, 2011 · Impala Cars & Parts By Year Classifieds. Fits all Belair, Biscayne, Impala, SS, and Caprice models from 1965-1970. 10-Bolt Casting # 3969277 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. com. Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. 875 ring gear diameter, 30 spline pinion, axle code D(E)H 123M, 13-43 gears 3. 73 12 BV X 4. 1965 Impala 12 Bolt Rear End. Thanks Camaro BOB 12-Bolt Casting #3875745N 10-Bolt Casting #3875744N. $1000. 31 12 BN 3. This code will tell you the ratio, whether it is posi or not, any special notes and what plant it was made at. 10 or 12 bolt will work. Code is 0330G1 which is March 30 Detroit Plant 1st Shift. D242 1234567890 CON2 No other tags or ID marks on this thing. May 12, 2024 · My 1965 Impala SS 409 came with a factory 12-bolt but I am having a really hard time figuring out what was standard and what was optional. I had always heard that any 12 bolt was a posi but my son just acquired a 65 Impala with the 327, four link and 12 bolt - and it is not a posi. What is the Date Code on it and also, what do you plan to put it in? Chevy Forums FREE technical assistance for your restoration and repair. Feb 2, 2014 · Hey guys I have a 68 that I have an 8 1/2" 10 bolt in it and I have been reading about the pros & cons of modifying a 65 -70 Impala 12 bolt to fit my Camaro. 5 is by the ring gear bolts. 90 up to 5. 56 12 BX X 4. 73 or 3. Oct 10, 2011 · Looking through Chevrolet by the numbers, the only FP code I see are for a Chevy II: 1966 12 bolt Posi 373, same for a 67 Chevy II, What puzzles me is the entire number: the codes listed state the breakdown as follows: FP02108 FP we already know 02 is February 10 10th day then I'm seeing G for Assembly plant, Detroit Gear then D for Apr 9, 2017 · 70 chevelle, SS clone 454 4 speed 3. 5 rear end has 7/16" ring gear bolts with 3/4" head and are left-hand threads. With 1968 being a leap year, the assembly is dated November 12. Same could be done to an Impala 12-bolt. 07. The codes are stamped as follows: DH 0331 G E DH = 3. I'm not a numbers matching guy so I do not know what the numbers mean. 250" wall seamless steel axle tubes Sep 29, 2009 · The BR code is a 3. 12-Bolt Production Month Codes. 08 open 10-bolt CPE - 3. For instance, the truck 12-bolt uses a smaller inner pinion-bearing (1. This includes the Spicer ten bolt, the Spicer 12 bolt and the new AAW 10 bolt 8. Oct 16, 2021 · Hello all so I got a 12 bolt for my car found the number but can't find any information on the code that's stamped on the tube can anyone help me with this?? It's stamped DD 1210 B I paid 400 for it complete drum to drum I was told it's a posi unit but have not been able to inspect it myself yet had my dad pick it up for me. 31 12 bolt rear axle with positraction 1020: Assembled October 20th B: Buffalo axle plant. Jim some 65-70 have 1 or 2 upper control are brackets. The rugged, reliable, and efficient Chevy 12-bolt has established itself as the preeminent rear differential for GM muscle cars since its debut in 1965. 73 12 BP 2. The gear ratio is 3:73, it's a posi. Dana and Spicer are two different names that refer to the same company (think of it like a Pontiac and an Olds. loosened the one bolt, and pulled it straight up and out. One way to tell the 8. 2 from an 8. 675 inches). Big Dave Dec 24, 2024 · 1965 Impala. The drum brakes are in really good condition. 55 on the 12 bolt too and the 3. I have sand blasted it removed all the bearings and gears. If you can spot a pair of left over control arm bushing mount ears cast onto the top of the centersection that would be a tip-off that is was originally a Chevelle 12-bolt, cut down narrower. Sure, why not. 56 : Yes (this code only used for 1965-67) 12 bolt, Metallic brakes : Eaton : EJ : 4. If serious message me and I can get you his number. Is there any other 12 bolts that can be modified to fit my car. 10 : Yes (this code only used for 1965-67) 12 bolt, Metallic brakes : Eaton : EI : 4. 00 OBO Thanks Asking Price: Best Offer Condition: Great 12-Bolt Casting #3917124 early model year, #3959038 has also been found with K88 cast date 10-Bolt Casting # 3917123 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. 2% Jul 19, 2020 · If your going racing with the car I would swap the rear out and while a lot of people swear by them I would avoid the BOP rear and go straight for a 12 bolt or 9" ford. 47%, IMAP 24. The code on the rear Alex tube comes back as a 273 gear, Non POSI. 45lbs/min, TPS 10. 73 Gears, Disc Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. (P2135 code) on my 06 impala. later usually used the 2 uppers. You can see how different they are from a 64-72 A body. My info shows same axles (30 spline, 31 17/64") for all 12 bolts along with previously mentioned same housing whether posi or not. 2 inch ring gear ten bolt is actually a misnomer. Thats what makes me suspicious. The old gasket was made of three thin layers of metal, and I found signs of exhaust leakage on one of the ports. I just bought a 12-bolt posi rearend from a guy. 55 with Eaton Tru Trac, full CBR suspension Team Chevelle Gold Founding Member #42 Aug 15, 2020 · There was a 12-bolt option for 1965-66 327" engine Nova that would be a retro-fit bolt in. 36 10 BD X 3. Code Location. The 12 bolt is a non posi but you would probably want a new posi unit anyway. All the 12 bolt housings should have the 2nd upper arm bracket. Jan 20, 2010 · There are even 12 bolts to be had (your rear end has ten bolts holding the 8. Housing ends are machined different on the two. 8' Ford car and truck rear ends. Nov 14, 2024 · 1965 to 1969 "DH" Impala SS 12 Bolt Posi-Traction 3. 88 : Yes (this code only used for 1965-67) 12 Mar 28, 2011 · it will bolt right in with no modifications. Jan 16, 2010 · 1966 Chevy 12 bolt For sale I have a 1966 Chevy 12 bolt rear end housing and axels from a 66 SS impala. 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. Aug 3, 2012 · I crawled under the rear of my newly purchased '66 SS, 396, convertible, A/C, PB, PS, TH350 to see if I could find the axle code so I can determine the ratio. 31 posi rear end rebuilt ready to go *** SOLD *** 12 bolt Impala Original GM Housing-Housing media blasted primed and painted-New 12 bolt 3 series positraction (eaton)-Original 3. Aug 1, 2020 · Was time consuming, but not overly hard. T. Nov 12, 2015 · A sample 1965-1969 rear axle code would look like DH1020B which decodes to the following: DH: 3. In 66 the V327s kept the 4 link but got the 10 bolt rears and only the V396/427s got the 12 bolt. 438-inch diameter pinion shaft and the size of the rear cover, measuring 10. Other Aug 7, 2015 · Re: Narrowing Factory 12 Bolt For More Backspace Find a 69 0r 70 Impala or Caprice 12 bolt and have that narrowed. Why are you even arguing the point? I just asked what the axle code translated to. 00 gears. There are no markings on the tubes or the rear end housing but it is a 12 bolt. 31 open GM53= internal foundry code K91= November9,1971 CON2 =another foundry internal code . Plus I cant find a whole lot of info on the codes I found so I took pics one of you experts can probably give me better insight. 350 2-bolt, stock 4bbl A123004 - 12 Bolt 30 Spline C-Clip Axles - Fits 1966-70 Impala A123004 We begin with premium quality alloy steel that is forged in Moser designed tooling, induction heat-treated to optimize torsional strength, and 100% magnafluxed. Jim Feb 8, 2011 · Engine Code Stamping Numbers All engines are stamped with an engine ID code, consisting of assembly plant code, production date and suffix code. Big Dave 1965-70 Impala / Full Size LH/RH 12 Bolt 31-3/8" Long, 5 Lug, 30 Spline Rear Axle. 31 12 bolt posi Here's a pic of a 65-70 Impala 12 bolt. 2" inches in diameter. 01 January 02 February 03 March 04 April 05 May 06 June 07 July 08 August 09 September 10 October 11 November 12 December Aug 2, 2019 · Over the years I have had probably a dozen or so Impala big car rear ends cut down to fit Camaro's and early nova's usually depending on the rear end date code so they were "Right" - early 12 bolts had the bigger 7/8" fill plugs and later had the 1/2" installed either mono or multi perches and sold them off - I do have one still fits 68-69 Jul 30, 2018 · not a camaro but I scored a factory KK code chevelle 12 volt (4. Future Mods: Black Roof ~Jose Jan 23, 2002 · I will take out and save the original 8,5" rear end and replace it with a built rear end, made for both dragracing and street. I have a 67 12 bolt coded for 4:10 dated 11 Nov 1, 2001 · I found a complete carrier from a 1966 Impala 12 bolt, 8. These numbers are located on the axle tubes on a 5 Lug Rear from a 6 Cyl 1971 chevy S/B truck. Mar 31, 2015 · this is a 12 bolt rear end that came out of my mom's 69 camaro ss 427 4-speed. Cleared TCM adaptives and made sure no codes before driving. The codes on the rearend are CKD 0826B, GM52, 3969278NF, H48, CON1, E stamp under cover, 1234567890. Only have maybe 100 miles on it so far, but night and day difference. The A full size gm 12 bolt. 10 posi. coils spring 12 bolt chevy impala rear 1965 - Car Engines & Engine Parts - Clementon, New Jersey | Facebook Marketplace '68 Impala Custom 396,700R4, 12 Bolt 3. ) but because by constantly spinning just one tire at twice normal axle speed, you burn off the limited amount of lubricant that Aug 30, 2009 · ratio You forgot 3. 73 10 BR X 3. 10 12 BW X 4. I don't want to wait a week ordering online and getting the wrong thing. 16%, temp 170. coils spring 12 bolt chevy impala rear 1965 - Car Engines & Engine Parts - Clementon, New Jersey | Facebook Marketplace. coils spring 12 bolt chevy impala rear 1965 - Car Engines & Engine Parts - Clementon, New Jersey | Facebook Marketplace May 26, 2012 · 1/3/12 09 Impala LT Installed: Alarm/Starter, 35% Tints, Black BowTie, Debadge, Trunk Lip, Window Visors, 18X8. Axle tube: EM0203(maybe) Apr 18, 2003 · The 3. Here are the numbers though: pass. He said that the rearend came out of a '70 chevelle. 56 gears $450. 5 Gunmetal/Polished ADR Battle EXE 245/45/18, 15MM Rear Spacers, Ebay Lowering Springs 1. Apparently Olds 12 bolts had 10 bolt ring gears. 07 12 BS X 3. The Impala brakes are bigger, so you'd have to pitch the backing plates and use Chevelle backing plates. This means parts are not interchangeable, which can come back to bite you later if you buy the wrong assembly. 10 posi 1965-66 impala 12 bolt rearend 4. I am asking $475. Feb 16, 2012 · 350 2-bolt, stock 4bbl #12 · Mar 6, 2012. since I just bought a 66 12 bolt posi and didnt need it, traded it to a buddy for a pair of edelbrock rpm heads je bought years ago and was never going to use. 38 (3. It will be the correct width (or at least closer than the Chevelle is) and because every car and truck made by GM since 1972 has used one they are as Dec 8, 2004 · I found that the Code "3852980N" 12 bolt posi-traction differential was installed in many different cars in the mid to late 60's. d. There are about 10, and they vary in length and size. Oct 16, 2021 · If the Rear is from a Full Size Chevy car from '65-'69, it is a Non-Posi with 3. Code Month. 56:1 12 bolt ring gear open rear end. i believe the ratio letters (first two in the sequence) are EM, but i could be mistaken. 07 12 bolt posi rear that was installed in 66 thru 69 and 71 Novas. Newbie; Posts: 8; 1966 Impala SS396 1970 Chevelle SS454 1972 El Camino SS350 1973 Chevelle SS350 Jan 2, 2012 · 3969278NF = 1970-1972 12 bolt housing CW =3. This has the 3 link type setup with panhard bar. The 67-70 arms were different. 56 10 BB X 2. Jan 15, 2000 · 72 Concours Wagon 5. Sep 8, 2010 · 3969341 12 bolt complete from a 1969 Impala. The housing has the 12 bolt casting number and the carrier is a 12 bolt with the 12 bolt part number on the ring and pinion. 31 GM used gears (Original to this housing 1969 date code)-New bearing and seals-New Axle bearing and seals 12-Bolt Casting #3894860 10-Bolt Casting # 3894859 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. 1965-70 CHEVROLET IMPALA 12-BOLT REAR AXLE REAREND - WE CAN SHIP UPS | eBay Order one today and bolt in a bullet-proof 12 bolt rear end for your 1965-1970 GM B-Body Impala, Caprice, etc. 00" o. Jan 24, 2023 · I purchased a 1966 impala 396 4 door with the original matching numbers 396,turbo 400 ,12 bolt posi ,still intact ,needs a lot of work ,but got time now since retirement ,always loved these cars ,have had many Chevelle's and Camaro's ,I will be looking for used original parts and pieces ,recently joined this site for help from the people that know //// T I have a ‘63 Nova that I bought that’s equipped with a shortened 12 bolt out of a ‘70 Impala. Fuel sys 1 closed loop, load value 12. 81hg, RPMs 1160, 41. that will take a beating! The standard set up includes: 12 bolt rear end housing with all stock style suspension mounts installed; 3. 55 12 BU X 3. Parts for sale 1965-66 impala 12 bolt rearend 4. Apr 13, 2018 · When looking at a 12-bolt rearend, it is important to know that 12-bolt axle assemblies use different components for cars and trucks. This code consists of 7 digits and characters indicating the stock gear ratio, month/day of assembly, and the assembly plant. Its on my Impala 2011 3500. 250" wall seamless steel axle tubes; Custom alloy axles (30, 33 or 35 spline) Jan 31, 2009 · Your axel ID codes are stamped on the axel tube about the middle of the passenger side facing forward. 12-bolt Chevrolet. 12-Bolt Assembly Plant Codes. Just had to keep going down for sockets that I dropped trying to undo (and redo) all the bolts. The truck is a pile and I need a new axle. I. I always try to get people to leave their Camaro 12 bolt alone and cut up Jan 9, 2013 · It appears that 12 bolt rear axles with casting number 3969341 started showing up in 69 Camaros sometime around early August of 1969. It has both ears for the upper control arms and is complete. 5" ring gear was used in Chevelles. Have the stock tune in it right now. 1965 - 1970. 73, Grotto Blue, St Louis Car, Second Week of November 1967 Mar 29, 2011 · Still haven't put a pressure gauge on it, but there are some codes and freeze frame data with them. The 8. 50 inches narrower than the stock rear end. 875 inches. You can identify a truck differential by the smaller, 1. how did I find out ? went to replace the axles last year and found them to be the longer version instead. 2 inch ten bolt when equipped with the 12 bolt's 30 spline axles (found on all rear ends from 1994 and up Impalas: get a 1996-'99 Impala and you get disc brakes). At first Dec 23, 2019 · The two bottom ones I easily got from the bottom. These axles are non-tapered, with hardened bearing seats and machined c-clip grooves, to fit OEM applications. D, u sure its not a B. Prior to this, only the 3894860 casting number was used. The rear end is completely stock. 73 gears. Jun 28, 2011 · A Dana 60 is a bigger version of the 10 bolt (equivalent to a Dana 30) and the 12 bolt rear end (equivalent to the Dana 44) that GM bought from Spicer to use in all of their cars between 1965 and 1971. I know the difference. Model specific subject matter experts, classified ads and more. This rear axle is built to stand up to the demands of high-performance applications. Or buy a adjustable set. May 9, 2023 · 1965-70 Impala 12 bolt rearend EA code 2. Jul 21, 2006 · I have a 12 bolt 3:31 non posi out of 1965 Impala, but it's buried right now. S. '69 Camaro Dart 400-AFR 195-224/224 HR-Powerjection III TB with F. 3. Jump to It wasn't until late 1972 that the 10 bolt 8. 56 10 PE X 3. 73:1 (4. B Buffalo, New York G Chevrolet Gear & Axle W Warren, Michigan K McKinnon Industries . 23 1965 Impala SS 6. Oct 20, 2017 · I've cleared the code three times but it keeps coming back. 36 10 BI 2. might check date& cast #'s just to be sure Mar 7, 2010 · You will need the upper arm and frame bracket from a 65 or 66 impala. Aug 15, 2009 · Driver's side manifold had several bolts that were fingertight (!) and one random non-graded bolt in position 1 (front). Nov 10, 2013 · 12 bolt Chevy Impala open rear removed from a 1965 Impala SS 327 4 speed car, axle code DD. 1965 impala 12 bolt core spins & is complete probably needs rebuild gear unknown decodes as 3852980N=1965 impala 12 bolt / F285=june 28 1965 / width 58: B2B Axle tube code EPU 701. 3L, 4L60E, 12 bolt posi 3. 00 1966-1970 Chevy Impala 10 Bolt 28 spline 31-5/16" Moser Axle Shafts (Pair) $319. 55 posi for a 1969 Nova 06= June Sep 18, 2013 · The 8. That makes it 64 " from wheel to wheel. I'm interested in the GM 12 bolt which Strange Engineering is offering with 33 splines, posiunit etc. D 55W Ballast W/ 35W 5K Bulbs, Retrofit Black Headlights. 5:" ring gear rear end. 73:1) was available in 1967. All 1965 models got the twelve bolt rear end as the ten bolt wasn't introduced until the 1966 model year (if yours is an early build date the 12 bolt wouldn't necessarily indicate a HiPerf motor). Over all width is just a hair over 63" drum to drum . _____ Jul 18, 2008 · impala flange to flange I have 58 1/4 for both 10 and 12 bolt 1965-1970. 08 10 May 25, 2016 · 12 BOLT rearend ID. They are different lengths. V8 codes are stamped on a pad just forward of the right side (passenger) cylinder head. If you ever plan to put down over 1000+ HP into slicks then you might want to go with a Dana 60, but these rear ends weigh a ton and you really don't need that kind of strength Nov 15, 2013 · 12B is the month and week built 12 is Dec, B is for second week D is a misc Fisher Body Code thats not documented 67-16867 is described above in VIN STL is code for St Loius Fisher Body 870-D is the interior trim code for Red vinyl bucket seat. The particular engine RPO code is listed in parentheses as found on build sheets. 08 10 PB 2. The rearend was just built, so it is in perfect condition. 875" Chevy 12 Bolt Car Rearend (will Not fit Truck) (will Not fit Oldsmobile) Cover Bolts: 12 Ring Gear Bolts: 12 Axle Splines: 30 Pinion Splines: 30 Package Includes the Following: 1- Chevy 12 Bolt Car 3. I own a dealer book however it only contains 1 option and I know their we're more. Other wise the four control arms and a 12 bolt in the Impala was reserved for a motor with a factory rated 300 horse or more (usually but not restricted to big blocks), or a police car (the 9C1 RPO group). 02-February 20- Day of the month Sep 29, 2020 · It's not an Olds 10 bolt. Jan 26, 2014 · In a 1967 Impala your ten bolt rear end open differential will probably break an axle not so much because the axle is all that weak (it is stronger than the same 28 spline axle size used on the 1958-'64 X-frame cars. The inspection cover on my two 12 bolts are the same. With it being shorter obviously the axles were replaced with custom but the axle offset it out of spec for running a disc brake kit, even a Wilwood kit that can be shimmed. Big Dave Mar 28, 2008 · I sold a 12 bolt yesterday and never paid attention to the casting number untill the guy loaded it up. 07 ratio. It measures 57" backing plate to backing plate. Note the (E) appears under the DH on the axle tube, I believe that this represents a posi unit which it is. The following will be a table of application codes for the axles used in the full-size Chevrolets. Perhaps the "always a posi" started in 66 whe the 12 bolts only came behind the big blocks. I tried searching, but gave up after no luck. Jun 16, 2007 · 12-Bolt Housing: Casting # 1965 Chevelle 3859140N 1966 Chevelle 3875745N 1967 Chevelle 3894939NF 1967 Chevelle-Late 3917124NF 1968-Early 69 Chevelle 3917124NF 1969 Chevelle 3959038NF 1970-72 Chevelle 3969278NF 10-Bolt Housing: Casting # 1964 Chevelle 3839390N 1965 Chevelle 3959139N 1966 Chevelle 3875744N 1967 Chevelle 3894938NF 1968 Chevelle Find 1965 CHEVROLET IMPALA Differential & Rear-End Components and get Free Shipping on Orders Over $109 at Summit Racing! GM, 8. I have surched the Internet and the 3969278NF is supposed to be a 71-72 but date code dosent match. 31 ratio. 12-bolt Oldsmobile The GM 12-bolt rear axle assembly receives its name due to having 12 bolts on the rear cover of the housing. 31 Gears. etc. 73 10 BQ X 2. Complete except for the brake drums which are not included. The 3969278nf looks like a casting number or part number, can't help there. Feb 15, 2010 · He said Impala 12 bolts were pretty easy to find so that was usually what he used. I know it's not an original 427 rear end. This rear axle was available in GM's high-performance intermediate cars, full-size vehicles and light-duty trucks. 00 plus shipping 918-851-9064 Located in Broken Arrow Oklahoma 74012 We have thousands of 1965-70 Impala used original parts in stock. Aside from that common mistake, KD is 68 and newer code for a 2. A. 73 non-posi unit, C is for Chevrolet and 316 is the day of the year. 7In, Monroe Struts & Mounts, Shorted Dog Bone, H. There's Camaro, Chevelle, Nova casting numbers everywhere, but none for my Impala. There was also a GK code used on '71 Nova but I believe that was a 10 bolt. , 12-Bolt, Each. 07 12 BM 3. Heavier trucks that have a Dana 60 or an AAW 14 bolt rear use a different flange. 17 are available in the aftermarket to fit a 12 bolt four series carrier without a spacer plate). After compareing the chunk to one of my camaro rears, they were the same. 2 rear end now; 1996 cars and up Oct 30, 2010 · In the book "Original Camaro 1967-69" by Jason Scott page 123 indicates RPO code H05 (3. 36:1 Positraction, 1025 ~ Month [Oct] and Day [25], B ~ Buffalo (G=Chevrolet Gear & Axle, W=Warren, K=McKinnon Industries). Dec 6, 2019 · Application: 1965-1972 GM 8. Part 04-19-20 06:12 PM - Post# 2791561 In response to Cleatus I see no reason why that wouldn't work. Being assembly line pieces, there are often factory flaws in the part. B is Fisher code for bucket seat Apr 15, 2015 · Dave, Don't know if you are in need of a 12 bolt, but I have one from a 1970 Impala. it is a late june '67 build car and uses the longer axles like a 68-72. A big box box store can help me just fine if I can find the year the rear end is from. Jun 17, 2024 · I have a 66 396 impala 4 door with original engine , turbo 400 , 12 bolt posi rear end , have checked all numbers , but rear end , everything else is matching , need some one to break down the code for rear end please the numbers and letters are E Q 0214 B and E , thanks FOUND IT ON IMPALAS. Jan 23, 2007 · Jump to Latest 4K views 14 replies 14 Sep 14, 2001 · Got a quick question for you guys about the width of a 12-bolt rearend. Axle flange to axle flange 63 1/2", backing plate to backing plate mount 58 3/8" it has leaf spring perches that are 38" center to center. Just talked to the guy narrowing the housing and if you want to use stock housing ends and Chevy2 drum brakes you will need housing ends from a Nova, Chevelle, or Camaro. It was labeled as such because GM contracted with Dana-Spicer corporation to supply a reworked version of their old Dana 41 design as a new 10 bolt rear to replace the old drop out center section rear first designed for the 235 straight six. What I am looking for are dates (casting date of housing and assembly date stamp - with letter codes - on the axle tube) for early 3969341 axles and late Dec 12, 2004 · 1966 Impala SS396 (new) 1970 Chevelle SS454 (new) 1972 El Camino SS350 (new) 1973 Chevelle SS350 (new) Wher is the code located on the 12 bolt rear? Save Share Jul 2, 1998 · 1970 and earlier axle code example: QY 01 01 G E. x 0. Save your Original! I bought one out of bone yard for $125. Jan 19, 2012 · 12 bolt 1969 Impala 3. I checked. . (this code only used for 1965-67) 12 bolt, Metallic brakes : Eaton : EG : 2. 08:1 to 3. If you know how to ID this it will help me thanks. 56 10 BC 3. 2 inch ring gear to the positraction carrier if you have a "P" case) that will actually bolt in out from under a 1965-'72 Impala (after 1972 GM went to the Corporate 8. Mar 22, 2009 · I have a 12 bolt rearend that im rebuilding and converting to a possi. The wheel bolt patern is 4 3/4" ,in 71 it changed to a 5" bolt patern. Made from 1541H steel, this axle contains significantly more manganese than 1040 or 1050 steel versions. I was going to use it in my 65 but after rebuilding my 10 bolt and installing new Moser axles, I'm good like this. Decoding Rear Axle Codes. Apr 24, 2009 · 1968 Axel codes for full size cars translates as: G- Detroit Gear & Axel EA-2. 2 rear end has 3/8" ring gear bolts with 9/16" head where the 8. 0 than 8. I can't remember whether the Impala rear has the upper control arm ears like a Chevelle or not. Mar 2, 2013 · Yes. 55 Ring and Pinion Set (Richmond Excel Gear) 1- Chevy 12 Bolt Car Yukon Duragrip Posi LSD (30 Spline) A123004-1 - 12 Bolt 30 Spline C-Clip Axle - Fits 1966-70 Impala Moser offers forged steel street axles for 10 & 12 Bolt Chevy and 8. 42 thru 5. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. I will check the 64 and older in a minute. 31, LS 4 wheel disc brakes 63 Nova wagon LQ4, T56 Magnum, Moser 12 bolt 3. Example: CG1025B decodes to CG ~ 3. However, the smaller 10-bolt unfairly gained the reputation as a weak […] Sep 7, 2014 · I am thinking with the 283 four arm Impala that might explain it. Casting Numbers: 12-Bolt Casting #3917124 10-Bolt Casting #3917123 Chevy 12 Bolt Impala 30 spline 31-3/8" Axle Shaft $240. 01mph, MAF 2. Just don't use 65-66 upper control arms on a 67-70. Sep 17, 2009 · I have a 65 ss 327/pg 12 bolt axle code is DH0402B (non posi) what is the ratio?turns indicate around 3. 31 Rear End. ORG Feb 20, 2016 · All modern GM rear ends share the same square flange that the backing plate bolts to. The 12 bolt four series carrier (casting number ED30174) supports gears from 3. It had an Olds Muncie in it. Feb 25, 2012 · 32K views 12 replies I'm trying to find the paint code for on a 2008 Impala. 5" ten bolt with the same small 28 spline axels you have in your 8. ngzxh fpexl eduf mxb mafr imstf zcuzox gie nxoaa daebhrv ltbxj pnorxdd ihgfn njqvr uifam