Clunking noise from rear when stopping

[stevem]

Recently I've noticed a clunking noise that happens as I'm stopping. It seems to be coming from the rear. It doesn't always happen. It usually happens if I accelerate and then come to a quick stop right after accelerating.

Are there any common fbody problems that this could be? I have a brand new transmission so I don't think its the transmission. Anyone have any ideas?

[BobbyZ72]

Re: Clunking noise from rear when stopping

how long have you had this car? you been driving it hard?

[stevem]

Re: Clunking noise from rear when stopping

I've had it about a year. I drive it hard occasionally but not all the time. By the way its a 97 with 110,000 miles on it if that helps.

[NOS2006]

Re: Clunking noise from rear when stopping

Any idea if the rear oil has been changed?

(Not sure if this would help/hurt anything, but... who knows)

[stevem]

Re: Clunking noise from rear when stopping

When I replaced the transmission I had the pinion seal replaced and the oil in the rearend was replaced then.

[camaroz87]

Re: Clunking noise from rear when stopping

i also have this problem it sounds like the car is shifting into second ...its an auto rite? i tested it out in a parkin lot and it makes a loud thump/knock like a shift

[Fred]

Re: Clunking noise from rear when stopping

It might be your gears going bad.

[stevem]

Re: Clunking noise from rear when stopping

Gears in the transmission?

[Fred]

Re: Clunking noise from rear when stopping

No the gears in your differential.

[SpeedingFirebird]

Re: Clunking noise from rear when stopping

You say only when you are stopping - so only when the brake is depressed? Do you have discs or drums.

I have seen something like this on disc brakes when a brake bolt breaks or comes out. The caliper will jump when stopping.

[stevem]

Re: Clunking noise from rear when stopping

No. Its not the breaks. It feels like something in the drivetrain. I can actually feel a hit, like one part is having to catch up to another part if that makes any sense. I think the gears may be the culprit like Fred is suggesting.

If it is the gears is this a costly repair? Is it likely that it will cause damage to other areas like the transmission?

[slow6]

Re: Clunking noise from rear when stopping

i loosened my stock shock, couldnt get the nut all the way back on.
now it makes that clunking noise, anytime over bumps, or just if you push the car down.

[Silver 99 Camaro]

Re: Clunking noise from rear when stopping

stevem...do you have a posi rear end, as in the Y87 package?

[stevem]

Re: Clunking noise from rear when stopping

As far as I know it is a posi. My mechanic said it was a limited slip differential. That's the same thing right?

[Silver 99 Camaro]

Re: Clunking noise from rear when stopping

Yeah, it's the same thing, but I just noticed it's a 97 so what I was thinking was wrong.

If you coast without applying the brakes at slow speed (<25 MPH) does it repetitively clunk? Or does it do it once?

It could be the U-joint which would also cause vibration at higher speeds, or the rear end. Perhaps the posi unit is shot or there is a lot of play in the pinion. At 110,000 miles either is a possibility.

Does it still do a 2-wheel burnout or not? If not, the posi unit is worn out and could be causing the clunk.