3rd Gen drums on 4th Gen rear?
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From: Thunder Bay, Ontario Canada
Car: 1985 Pontiac Trans Am
Engine: 305
Transmission: 700r4
Axle/Gears: 3.23
3rd Gen drums on 4th Gen rear?
I’m wondering if the completely new rear drum brake assemblies and e-brake cables on my 1985 T/A will bolt up to a 4th Gen rear end Im thinking of buying. It’s got 3.42 gears without any disc brake parts. Thanks for any info/help
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Re: 3rd Gen drums on 4th Gen rear?
This is just a SWAG, but I'd say no. Drum brakes require the tall bracket off the top of the axle to mount the wheel cylinder. IIRC, disc brake rears won't have that bracket.
Do a quick look at drum to disc conversions here. And if I'm right it will be obvious about the bracket.
RBob.
Do a quick look at drum to disc conversions here. And if I'm right it will be obvious about the bracket.
RBob.
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Re: 3rd Gen drums on 4th Gen rear?
RBob I kinda think you're right about that. 
Now if the 4th gen had been a drum setup, that would be a much greater possibility.
Now if the 4th gen had been a drum setup, that would be a much greater possibility.
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From: Kylertown,PA
Car: 85 Berlinetta
Engine: 350
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Axle/Gears: 10 bolt 3.42 with Torsen posi
Re: 3rd Gen drums on 4th Gen rear?
wrong thread
Last edited by Fullmonte77; May 13, 2026 at 08:48 AM. Reason: wrong thread
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