BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
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December 2018

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 Axle beef-up or new?

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Posts : 15
Join date : 2015-04-25
Age : 44
Location : S/E MA.

PostSubject: Axle beef-up or new?   Sun May 03, 2015 7:52 am

Curious if the rear end in my 96 is worth cleaning up and beefing up or just go aftermarket or something out of another vehicle. Looking for not much work involved type of stuff but if needed I'll get it done. And did a little hunting but not to much, nothing really on performance rear-ends I could find for a 96. When all is said and done I'm shooting 475ish-500hp to the wheels.

Ofcourse frame and stability mods will be done also.

And tire width also. Would like to get another atleast 2-3 inches of meat on the ground widthwise. With that can I get away with just a tub if needed and work the fenders if needed or would the rearend need to be shortened?
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Posts : 1
Join date : 2018-08-19
Location : Billerica, ma

PostSubject: Re: Axle beef-up or new?   Sun Aug 19, 2018 8:41 am

I run 275/60/15's in the back of my 88 wagon and
255/70/15 up front, both mounted on 15x8 truck rally rims. Front barely rubs when parking, the rears are great!

I'm not a 100% sure but I believe that the 77-90 wagon rear ends are the same width as the bubble sedans and wagons. I still have more room in the rear to go wider.

With my 4.10's, trutrac, Hotchkiss rear arms and 2400 stall, I get a 1.96 60ft time with 38-39psi in the tires.
I run the Cooper Cobras and I love em. Great at the track, on the road and amazing in the snow. And they stand up to a LOT of burnouts!

I'm actually bracing up a frame I picked up from a junk yard and I'm looking for and good mods to beef up the frame.


I found a lot of ideas for frame bracing on the b body's from looking at what guys did do their g body's and a body's.
The frames are similar, just smaller, but close enough to use the a and g body designs to make my own braces
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Posts : 4282
Join date : 2009-12-16

PostSubject: Re: Axle beef-up or new?   Tue Aug 21, 2018 3:09 am

Bumping 3 year old threads. Interesting.

Boxing the frame up tho is a good start. One of the other members here did that with his 87 coupe frame off. Pretty straight forward. And yea, the G body is pretty close to the B. No wonder they share the same factory service manual. Arrow
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Matt Trakker


Posts : 5093
Join date : 2009-07-30
Age : 37
Location : Reading, MA

PostSubject: Re: Axle beef-up or new?   Mon Aug 27, 2018 11:16 pm

Methinks the forum needs more bumping of old threads with useful info like that
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Posts : 2175
Join date : 2009-01-21
Age : 31
Location : NH

PostSubject: Re: Axle beef-up or new?   Wed Aug 29, 2018 9:54 pm

Wagon1320 wrote:

I'm not a 100% sure but I believe that the 77-90 wagon rear ends are the same width as the bubble sedans and wagons.  I still have more room in the rear to go wider.

I'm not so sure, in fact not even all the bubble sedans have the same width axles.
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