Hi all, I did a search for this and didn't find any answers so I figured I'd ask about it.

Anyways, when in reverse at low speeds my rear brakes start to grab on and off and make these clunking sounds. It's almost like the brakes are pulsating.

I had a buddy verify it by watching the brake calipers while I was in reverse. We took the wheels off and although my brake pads are close to needing replacement they weren't bad. The pistons weren't sticking either from what we could tell with the calipers off.

I was so bad sounding we even thought it could be the rearend making noise but I recently had 3.73s installed after that and the gears were fine and the noise is still there. I am not sure what to make of it since I am no brake expert but I have installed and changed brake pads and rotors plenty of times so I was hoping this was a possible easy fix if anyone knows what the issue may be.

Brake fluid level is good so no leaks or anything. It only does it in reverse and slow speeds. Once I am in drive it's fine. Other things I've checked just to be sure about the clunking sound is the tranny mount, driveshaft, and u-joints and everything looks good.

Any suggestions?


Edit: I guess it would help if I mentioned that it's my 2000 Trans Am, stock LS1 brakes.

 

Any help? I've searched quite a few forums and haven't found any answers. It's driving me nuts.

 

I also need to add that it's only when the brakes are hot, say after 20-30 minutes of driving/stopping. When cold they don't do this.