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1979 Trans AM Rear Disc Brakes?

Gary Smith

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Oct 10, 2024
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Please let me know if this has been covered before, and I will look into it.

My wife is the original owner of 79 TA with rear disc brakes as it had the original brakes on it.

When driving it a while back, I noticed that the brakes were not stopping as well as they had been, and the parking brake was not keeping the vehicle from moving on a slight grade.

I pulled both calipers, and they looked like they were frozen.

The pads looked like they had never been worn at all.

I replaced the rear calipers and pads but still have the same problem.

I bled the entire brake system.

With the vehicle up on jack stands, I applied the parking brakes and could still turn the rear wheels.

I checked the spring on the calipers.

They were completely compressed.

With the TA up on jack stands, I placed the rear wheels in motion with the engine on.

I tried to panic and stop the wheels; all it did was slow down them.

With the engine off, I had the brake pedal depressed fully, and then I rotated the rear wheels with a little effort.

I checked the front wheels, but I could not rotate them.

The master cylinder was replaced a few years ago.

The proportioning valve was replaced last year.

Is there some special way to place the lever on the brake caliper?

I appreciate any help you can provide.