ChrisR

I have a an '87 GTA with the famous 9-bolt ausie rear end. It is dying. I found a rear end out of 1991 RS Camaro, posi, unknown ratio, with DRUM brakes. I was wondering if I could retro fit this axle on by car that has disc brakes. I know, I know, it is a big downgrade, but I am not racing my car, just really fun to and from work trans. I will "get by" on drum brakes. My wifes Bonneville has them and it drives fine. I just need to know if I can do it and will the proportioning valves and master cylinder for the 4 wheel discs be a problem for this DRUM-idea. I can get this thing really cheap, I am on a really tight budget right now and IF I can do it fairly easy I will.


Also, can I put the disc brakes from the 9 bolt on the RS axle? That would be cool if I could. Thanks in advance.

Chris

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1987 GTA 350,rebuilt in 1998. new heads, Heddman headers w/y-pipe, Dynomax cat-back system, 45,000 coil, accel plug wires and cap&rotor, k&n, b&m shift kit and trans cooler, modified mass airflow sensor, manual fans switch. MSD 6A yet to be installed. No time slip.

1993 Bonneville SSE ALL STOCK. 98,xxx miles and stil counting...plan to install K&N and Flowmaster 80 series

JoelOl75

It's not really a 'major' downgrade in the sense. A problem you will encounter is that the axle will not fit inside the disc rotor. You can have them machined (lathe) or get disc axles ($$$).

In a pinch spend a day with a grinder and grind them yourself... there's alot of material to remove, but you don't want to get uneven or too close to the wheel studs (frequently check the fit).

This may cause slight balance probs if you do a hack job, but with the right setup it's not a big deal.

Put anti-sieze on the entire axle flange so it doesn't 'weld' itself to the rotor.