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Old 03-03-2009, 03:40 PM   #1
Eightupman
 
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Default 8.2 Rear End...

Ok, all this talk about rears and nothing posted in the Hot Chick thread makes me wonder....

But I digress.

I know people say that the bastard child posi (Buick) 8.2 is a weak rear. I have one that I planned on putting into my 72. Goal is for 300+ HP (at the flywheel of course) once I get the motor and trans done. I have no clue what the ratio is at the moment either. Never popped the cover yet. I also know that there are a couple folks here with ring and pinion sets for this rear.

SO, should I take the time and effort to completely go through this one for my Cutlass, or sell it to a 66/67 Buick guy, and buy an aftermarket setup for my existing 8.5?

I ask this mainly because I planned to have the entire drivetrain completely built and ready to swap part for part, in lieu of taking the car apart... then rebuilding... then putting back together. With the limited time that I have, I would rather not take the car apart for that long, for fear of it not getting back together for ten years, and becoming a statistic...

So... rebuild whats IN the car (8.5 pegleg) or rebuild the 8.2 posi in the garage?

John
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Old 03-03-2009, 08:29 PM   #2
one442

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Default Re: 8.2 Rear End...

8.5 all the way.

I mean if your not going for all original why bother. When it goes you'll kick yourself and it just makes more sense to kick the dollars into the 8.5 either way.

Had an 8.2 open in my 67. It was ok but I killed it and I don't really drive hard. Car was stock. Then again it was about 35 years old when it finally went. Plus it went trough many 3000rpm launches over the years.

In this case bigger is better I would go with the 8.5.
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1987 442 STOCK 307 - 15.179 @ 88.58 mph


7A head VIN 9 KZF 200-4R with a 8.5 3.73 air delete. Open/no air filter. 2 1/4" true dual Flowmasters with crossover. Alloy, mags, drums, and rad, 3560 race weight. Timing 22*, 23.8 inch diameter rear tires (4.07). Hypertech S R Chip. Mobile 1


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Old 03-03-2009, 10:23 PM   #3
J-(Chicago)
 
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Default Re: 8.2 Rear End...

Is the 8.5'' a c-clip rear end?
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Old 03-04-2009, 03:53 PM   #4
Eightupman
 
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Default Re: 8.2 Rear End...

Quote:
Originally Posted by J-(Chicago) View Post
Is the 8.5'' a c-clip rear end?
Most likely. I have not yet had it apart to know.

I also think someone I know still has an 8.5 pegleg that I could convert as well...

John
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Old 03-16-2009, 06:37 AM   #5
monzaz
 
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Default Re: 8.2 Rear End...

Well the 8.2 does have the bolt in axles BUT the parts are more plentiful and cheaper for the 8.5 and since you already have the 3.73 installed form the factory installing a posi will be a snap ...EVEN for someone not familair with rear diff set-ups.

You will not need to reset the ring and pinion, you will just be removing a open carrier for a posi carrier. We can sell you the correct parts and even walk you through the install on the J D Race.com web site.

Reconditioned 10 bolt 8.5 GN posi unit is 289.00 with new carrier bearings installed and ready to go.

Take care and just PM if we can help with any other questions.
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