"Knocking" in the rear?

[SupermanX24]

Well, here's my issue. I heard some clunking and knocking in the back, I was due for some shocks anyway, still had the OE's on there. Put the new ones on and I'm still hearing the same clunk. Also when I'm making a gradual turn I can here a "knocking" coming from the back. Like it's a loose wheel or something. I inspected everything back there, the control arms, sway bar links, all the bushings, I can't seem to find anything wrong back there. Anyone have any sort of clue as to what I might have? Did I miss something?

[bubba428]

sounds like the panhard bushings are shot....lay under the back and shake the car side to side

[98tadriver]

sounds like the panhard bushings are shot....lay under the back and shake the car side to side

is the sound consistent with the speed of the car? check your lug nuts make sure theyre tight. i would say its something with the rear if you checked all of the bushings back there.

[deadtrend1]

there are lots of moving parts back there. I had noises from my shock nut being a little loose, to actually my brake pad making nosies on bumps.

you just have to look under while someone moves the car in difference directions to see if you can narrow it down.

[edpontiac91]

I would guess that if you have a POSI rear, that the clunking sound might be the clutches in the rear. Usually when making a turn, the clutches are trying to grab more on one side and they chatter. You might want to put in a GM Additive that is made for this. It used to be whale oil, but they have since changed the formula, but it does work.

[Slo86Bird]

my rear does the smae thing........and another thing my car does, not to get off topic, is when u turn the wheel far, it locks up and the front end just kinda slides.

[SupermanX24]

is the sound consistent with the speed of the car? check your lug nuts make sure theyre tight. i would say its something with the rear if you checked all of the bushings back there.

The lugs are tight, and the sound is consistant with the speed of the car but it doesn't seem to be as fast as the speed of the car.

I would guess that if you have a POSI rear, that the clunking sound might be the clutches in the rear. Usually when making a turn, the clutches are trying to grab more on one side and they chatter. You might want to put in a GM Additive that is made for this. It used to be whale oil, but they have since changed the formula, but it does work.

When I did a rear swap on my car I put GM additive, damn bottle is expensive too. I guess I might have to inspect the rear and open her up. That sounded wrong, but it's not. lol.

[WildBillyT]

I would guess that if you have a POSI rear, that the clunking sound might be the clutches in the rear. Usually when making a turn, the clutches are trying to grab more on one side and they chatter. You might want to put in a GM Additive that is made for this. It used to be whale oil, but they have since changed the formula, but it does work.

I thought that 4th gens got a cone-stye Auburn or a Zexel Torsen diff... neither with clutches?

Either way, the additive doesn't hurt. I'd put the car on jackstands in neutral and slowly turn each rear wheel by hand. Listen for clunking. Then pull on each wheel and see if there is a lot of play.

[wretched73]

I had a similar sounding clunk, but it was only on the drivers side. I looked at the bracket where the sway bar mounts to the body of the car. That was real loose and once i tightened it up i had no more clunk

[camaro2you]

I had a clunk/rattle after i did a rear swap in my 98z and it turned out to be the drivers side caliper bracket, somehow the locktite let loose.

[maroman88]

i had a clunk, then my rear blew, again lol

[98tadriver]

i had a clunk, then my rear blew, again lol


hahaha been there

[SupermanX24]

Well, I fixed the major "clunk." Just a loose nut on the trailing arm. But I still hear that dreaded knock while making a gradual turn... :cry:

[bubba428]

my rear started making the "clunk clunk clunk clunk" when making a turn...didn't do it it much this week

[IROCdan330]

Well, I fixed the major "clunk." Just a loose nut on the trailing arm. But I still hear that dreaded knock while making a gradual turn... :cry:

posi rears can sometimes make that noise when turning like stated above, esp if enough limited slip additive wasnt used...nothing wrong with pulling off the cover and taking a look see...


I thought that 4th gens got a cone-stye Auburn or a Zexel Torsen diff... neither with clutches?

Now, I could be very wrong, but I think I remember reading that they were SLP edition 4th gens only? I dont know...

[SupermanX24]

posi rears can sometimes make that noise when turning like stated above, esp if enough limited slip additive wasnt used...nothing wrong with pulling off the cover and taking a look see...

Actually now that I think about it, I only started really noticing that noise after I took out the backseat. So maybe it's normal to a point?

[Jam]

F-bodys ARE WELLL KNOWN for their unknown noises in the rear.

[NJ Torque]

Thanks alot for that info. I think we all know they have glass rears. Your 5 months late with your insightfull-ness.

[Jam]

anytime v6

[bubba428]

the resurrector strikes again

[sweetbmxrider]

we got a twitcher! hahaha