Rear Disc Brakes
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From: Displaced Texan living in NC
Car: 1988 Pontiac Firebird Trans AM GTA
Engine: Tune-port Injected 6.3L
Transmission: Borg-Warner T56 six-speed
Axle/Gears: Borg/Warner 9-bolt with 3.70:1
Rear Disc Brakes
Looking to replace the rear brake rotors on my stock 9-bolt here soon. I know parts are difficult to find since it's been rebuilt within the last year. I'd like to upgrade to different brakes, but don't have the cash for a major upgrade. I'm looking at a set of drilled/slotted rotors but I'm not sure if they're for the 10-bolt or if they'll fit the 9-bolt. The only thing Summit gives about fitment is they fit the 1988 Trans AM. Are the rotors different between the two rears or are do they have the same rotors? I know backing plates are different based on things I've read here on TGO. Appreciate the info. 
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Rear Disc Brakes
All brake parts are common between the 9 and 10 bolts, except the backing plates.
Thread Starter
Member
iTrader: (5)
Joined: Mar 2005
Posts: 263
Likes: 0
From: Displaced Texan living in NC
Car: 1988 Pontiac Firebird Trans AM GTA
Engine: Tune-port Injected 6.3L
Transmission: Borg-Warner T56 six-speed
Axle/Gears: Borg/Warner 9-bolt with 3.70:1
Re: Rear Disc Brakes
Appreciate the reply. I'll go ahead and order.
I'll go ahead and order. 
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