What is the 'clunk' ???
Thread Starter
Instructor
Joined: Feb 2001
Posts: 132
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From: cameron mo
What is the 'clunk' ???
87 z51-- new suspension bushings except diff carrier--tight bearings
Driving 70-80-90 on interstate --runs smooth. but then slowing down
gradual slow down--
for the off ramp--just before the stop sign---a 'clunk' sound from
underneath--maybe diff--maybe trans??? does everyone have this??
all ideas appreciated -- thanks
Driving 70-80-90 on interstate --runs smooth. but then slowing down
gradual slow down--
for the off ramp--just before the stop sign---a 'clunk' sound from
underneath--maybe diff--maybe trans??? does everyone have this??
all ideas appreciated -- thanks
Racer
Joined: Feb 2002
Posts: 299
Likes: 0
Re: What is the 'clunk' ??? (chas stark)
It's difficult without hearing the sound and having a specific idea of what area of the car it's coming from. Could be one of several things tho...
1. U-joints. If a U joint is getting sloppy, especially on an automatic when you put it in gear, you'll hear a clunk. To check that, with foot on the brake, put into drive. Then, without moving, drop it in reverse. If you get a clunk underneath the car, like, right under you, it's the front U. If it makes the same clunk and sounds like it's near the rear, it could be the rear U joint. You may have to hang out of the car with the door open, stick your face down as far as you can to the underside of the car to hear more specifics.
2. Tranny. Could be, hope it's not.
3. Rear end differential. Again, could be but hope it's not.
If your U joints check out and the sound doesn't happen when you try the test above, just come back and post us a followup. We'll all try to help as much as we can. Good luck. :cheers:
1. U-joints. If a U joint is getting sloppy, especially on an automatic when you put it in gear, you'll hear a clunk. To check that, with foot on the brake, put into drive. Then, without moving, drop it in reverse. If you get a clunk underneath the car, like, right under you, it's the front U. If it makes the same clunk and sounds like it's near the rear, it could be the rear U joint. You may have to hang out of the car with the door open, stick your face down as far as you can to the underside of the car to hear more specifics.
2. Tranny. Could be, hope it's not.
3. Rear end differential. Again, could be but hope it's not.
If your U joints check out and the sound doesn't happen when you try the test above, just come back and post us a followup. We'll all try to help as much as we can. Good luck. :cheers:
