9 bolt drum to disc swap
Thread Starter
Senior Member
iTrader: (4)
Joined: Mar 2001
Posts: 999
Likes: 0
From: Nebraska
Car: 1985 Trans Am
Engine: 400
Transmission: 700R4
Axle/Gears: 3.70
9 bolt drum to disc swap
My 9 bolt currently has drums, and I found a 9 bolt with discs. If I get the backing plates and everything, will there need to be any modifications made to my axles, or will everything bolt up? Also, exactly what will I all need from the donor car to make this work. I'm sorry if this is all a stupid, redundant question, but I tried a search, and couldn't find anything specifically about a 9 bolt.
Thanks,
Eric
Thanks,
Eric
Member
Joined: Nov 2002
Posts: 212
Likes: 0
From: Chicago
Car: 85 Trans Am
Engine: SBC
Transmission: TH400
Axle/Gears: Moser/Strange 9"
Sorry to bring back a post from the dead, but I'm interested in the same swap. I have a 9 bolt open drum rear in my 85 right now, and I have an 85 posi disc 9 bolt rear. Would the new rear swap in with no other mods?
Supreme Member
iTrader: (7)
Joined: Mar 2001
Posts: 6,420
Likes: 5
From: Fort Mill, SC, USA
Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
Yes, just swap the brakes over...they're the same rear after all.
Ed
Ed
Supreme Member
iTrader: (7)
Joined: Mar 2001
Posts: 6,420
Likes: 5
From: Fort Mill, SC, USA
Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
Technically, you should swap the prop valve to the 1LE part but I'd try them out first and see how they work.
Ed
Ed
Thread
Thread Starter
Forum
Replies
Last Post
hectre13
Engine/Drivetrain/Suspension Parts for Sale
2
Dec 11, 2023 08:14 AM
sailtexas186548
Engine/Drivetrain/Suspension Parts for Sale
8
Jan 19, 2016 12:21 PM
1992 Trans Am
Engine/Drivetrain/Suspension Parts for Sale
1
Aug 8, 2015 08:16 PM