Help ID my rear end

03RedWing
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Posts: 2
Joined: Sat Apr 22, 2017 11:41 am
Location: Oberlin

Help ID my rear end

Postby 03RedWing » Sun Apr 23, 2017 8:51 pm

Hi,
A few years ago I bought a street rod and according to some of the paperwork that was given to me when I bought it, the car has a 69 Chevelle rear end with 3.31 gears. Well I have been searching and trying to figure out what rear end is in it. I'm pretty sure it is not a 69 Chevelle and after pulling the cover and counting the teeth, it has 2.56 gears/open carrier. I'm thinking it is an 8.2 GM BOP out of a Pontiac. Not sure though so that's what I'm Hoping you can help with. I built the engine to about 375 HP over the winter and built a 700R4 to replace the 350TH it had in it. I'm planning on putting in 3.55 gears and a posi carrier.
Here is what I know. Please see pictures.
1. 10 bolt cover with half moon at 3 and 9 o'clock
2. Bolt in axles (Hole in axle flange to access bolts to remove axle)
3. 41 tooth ring gear. 16 tooth pinion gear.
4. "A" casting on upper left
5. "N" and "D" casting on upper right
6. Two sets of casting numbers on lower right. "1188" and "9799100"
7. On front of housing. Two ribs on each side.
Thanks in advance.
Jim
Attachments
Rear End 3.jpg
Rear End 2.jpg
Rear End 1.jpg

03RedWing
Newbie Poster
Posts: 2
Joined: Sat Apr 22, 2017 11:41 am
Location: Oberlin

Re: Help ID my rear end

Postby 03RedWing » Sun Apr 23, 2017 8:53 pm

Couple more pictures.
Attachments
Rear End 7.jpg
Rear End 6.jpg

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monzaz
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Posts: 820
Joined: Tue Nov 13, 2007 7:56 pm
Location: RICHFIELD, OH

Re: Help ID my rear end

Postby monzaz » Mon Apr 24, 2017 8:19 pm

oK YOU HAVE A 1969 Pontiac 10 bolt 8.2 rear end
Axles are 28 spline bolt in - it is not original to the Chevelle BUT can be a very good candidate for better power in a 10 bolt rear.
the date is September 18 1969 housing (I 18 9 ) was not a (I188) ity is Letter I (month) and number 18 DAY and Year 9
gear ratio is a 2.56 freeway flyer gear NON POSI
You can fit any ratio you want in the rear ...NEW posi and 3.55 gears will fit right in.

We sell all the parts for it or you can go else where too.
Axle bearings will be seal and bolt in from the housing end flanges.
This rear will take the same brakes as your 12 or 10 bolt Chevelle rear also. 9.5 x 2

U-joint will be slightly bigger than a Chevy also again more strength. ALL Buick Olds and Pontiacs got bigger yokes than the Chevys.
J D Race


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