9-bolt disk to a 10 bolt drum rear
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From: forest hill md
Car: 89 formula
Engine: 305tpi
Transmission: t-56
Axle/Gears: ford 9" 4.11s
9-bolt disk to a 10 bolt drum rear
i have anb 89 formula with a 9 bolt in it and it needs to be rebuilt bad, it has alot of backlash and the posi doesnt work anymore, and my dad had an old 10 bolt open drum rear and i was curious if anyone could tell me what it would take to change the 10 bolt to disc, im trying to use most of the parts off the 9 bolt to save money like the calipers and the rotors any help is appreciated
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iTrader: (7)
Joined: Mar 2001
Posts: 6,420
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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
The '89 9 bolt has the PBR calipers correct? Then all you'd need to do to swap the discs over would be 10 bolt disc backing plates and a little mods to the axle flange. You won't even need to disconnect the brake lines if you don't want to, just leave them hanging there. The axle flange mods are covered in the tech article section but it's fairly straight forward.
Ed
Ed
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
through GM the 10 bolt backing plates are $15.87 each
right backing plate part #10136854
left backing plate part #10136853
right backing plate part #10136854
left backing plate part #10136853
Last edited by 91banditt2; Feb 19, 2006 at 07:23 PM.
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