I have a 1994/1995 Chevy Blazer (of course) and I have a slight problem.

When I put it in reverse and give it a bit of gas, I get a loud thudding, kind of skipping noise. ITS ONLY IN REVERSE THOUGH!!!

I thought it was something in the drum breaks like loose springs or something but I had it checked out and they were all fine.

The noise is definately something in the rear end, thats where I feel it and thats where I hear it.

I guess it could be something in the differential but I really have NO idea.

Please let me know what it COULD be or what you THINK it is, cuz I know you can't tell me exactly what it is.

 

Its gonna take you getting under there and looking. It could be bad mounts on trans or exhaust or transfer case or rear end. It could be the u joints on the drive shafts. It could be a bad bearing in the rear end. Check u joints for any play at all if so they are bad. Look for leaks and check mounts on everything i mentioned above.