rear clunk / thunk noise just before stopping
#1
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Hi, this might be my first post here. I have been waiting and looking for an XK8 purchase. I found one which I rather like, although it has HIGH mileage (120,000). the car runs, shifts, and stops very good but I have noticed that when coming to a stop (EVERY stop) a CLUNK or THUNK noise comes from the rear end just prior to a full stop. I suspect his is not good situation. I'd really appreciate the forum's thoughts on: #1 What the likely cause of the noise is and # 2 ( assuming the car checks out on an inspection prior to purchase) what this convertible is really worth.
Thanks from Colorado !
Thanks from Colorado !
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Pistnbroke (03-03-2022)
#2
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The noise could be anything from a loose brick moving around in the spare tire well to an issue with the axle / brake caliper / transmission etc. etc. etc....
First things first - remove the trunk floorboard and look for loose objects moving around in the spare tire well. If you find nothing, don't purchase that car until you can locate the source of the noise so you know what you're dealing with....
First things first - remove the trunk floorboard and look for loose objects moving around in the spare tire well. If you find nothing, don't purchase that car until you can locate the source of the noise so you know what you're dealing with....
#3
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You don't mention the year but a common "problem" is the transmission rather splitting into first gear as you come gently to a stop. This is mostly an artifact of the transmission programming in our cars and is a sort of idiosyncrasy that they have.
Fluid changes can help some but I've also found that braking harder to a stop makes the thunk much less likely to happen. That isn't how I normally drive but is an interesting observation, almost as if the car isn't really sure you intend to stop when you are easy on the brakes.
Fluid changes can help some but I've also found that braking harder to a stop makes the thunk much less likely to happen. That isn't how I normally drive but is an interesting observation, almost as if the car isn't really sure you intend to stop when you are easy on the brakes.
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Johnken (03-04-2022)
#7
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#8
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Not a suggestion, really, but more a question for those more knowledgeable. Could this be something to do with the torque converter unlocking? I have on occasion noticed a similar sensation when coming to a gentle stop, which I rarely do. I have lived alone for ten years now, so I do not have an onboard critic.
#9
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You don't mention the year but a common "problem" is the transmission rather splitting into first gear as you come gently to a stop. This is mostly an artifact of the transmission programming in our cars and is a sort of idiosyncrasy that they have.
Fluid changes can help some but I've also found that braking harder to a stop makes the thunk much less likely to happen. That isn't how I normally drive but is an interesting observation, almost as if the car isn't really sure you intend to stop when you are easy on the brakes.
Fluid changes can help some but I've also found that braking harder to a stop makes the thunk much less likely to happen. That isn't how I normally drive but is an interesting observation, almost as if the car isn't really sure you intend to stop when you are easy on the brakes.
#10
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When its in normal rather than sport it starts in second not first. You could try knocking it into neutral as you stop to see if that takes it away ( removes load on drive train)
Sounds like play in
1/ Drive shaft joints
2/ backlash in the differential ...mine has a little
3/ play in a propshaft joint.
All are easy to find if its up on a lift.
If its the differential dont worry too much just put some thicker oil it SAE 140
I see this is 2012 but may help the last poster.
Sounds like play in
1/ Drive shaft joints
2/ backlash in the differential ...mine has a little
3/ play in a propshaft joint.
All are easy to find if its up on a lift.
If its the differential dont worry too much just put some thicker oil it SAE 140
I see this is 2012 but may help the last poster.
Last edited by Pistnbroke; 03-03-2022 at 01:39 AM.
#11
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Only when stopping gradually and makes no difference if it’s in gear or in neutral.
Seems to be getting worse !
Have changed gearbox oil, diff oil and there’s nothing in the boot….
Did OP or anyone else have any joy in finding out what was causing this issue ?
Thanks
Seems to be getting worse !
Have changed gearbox oil, diff oil and there’s nothing in the boot….
Did OP or anyone else have any joy in finding out what was causing this issue ?
Thanks
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sultzaberger
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09-19-2013 07:01 AM
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