Knocking sound when brakes are on
On my '88 XJ I've noticed a knocking noise when I'm stationary, in drive & of course on the brakes (say at traffic lights). I can feel a physical clunk along with the sound.
What would this be / how do I fix it? Thanks in advance guys. |
take a look at your exhaust it fits in a rubber fitting and it sometimes comes out and make a rattling noise
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Where's the sound coming from? Can you elaborate on the sound details?
Mike |
Is it just when the brakes are fully on? Or is it also when slowing down?
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Originally Posted by Mike1998XJ
(Post 296725)
Where's the sound coming from? Can you elaborate on the sound details?
Mike I'll be putting in a new CPS on Thursday, when it's up in the air I'll have a friend stand on the brakes to replicate the problem & see what I can see. Doobie - I'll listen more carefully as I'm slowing down but it's definitely more noticeable at a dead stop. bsflipfrontflip - I'll check that on Thursday as well but presum I should here noises as I go over bumps in the road as well |
Okay. it can be many things. but if it sounds like its under you, then it could very well be a drive line.
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i had that probly and i could only hear it when i was slowing down or stopped
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Do you know how to check the u-joints on the front driveshaft? And the slip joint? Odd that the sound would happen when stopped though... A clunk or metal to metal bind might lean us towards the front driveshaft. A metal tinging sound would lead us to the exhaust pipe.
I wonder how the motor mounts and transfer case mount is? Can you check those? Mike |
Ahhh, wait a minute... It's not the transfer case shift handle is it? When you hear the rattle can you stop it by putting your hand on the transfer case shift handle?
Mike |
Originally Posted by Mike1998XJ
(Post 297125)
Ahhh, wait a minute... It's not the transfer case shift handle is it? When you hear the rattle can you stop it by putting your hand on the transfer case shift handle?
Mike Mine made a squeek which was the TC handle. |
OK so I turned the radio off & had a proper listen today.
It is definitely a clunking noise from underneath the front of the car - I also noticed it made the same noise on hard acceleration....when it's just cruising along the noise isn't there. I did not notice the noise as I was slowing down. I had wondered if it was something like a u-joint. When I'm underneath her tomorrow I'll see if anything is obviously loose. I'll see if it's the transfer case handle & I'll see if it happens in any other transfer case position....she's always been in 2wd since I got her. |
I went for a short drive in part time 4wd & a short drive in full time 4wd high...the same noise occured in both settings.
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Originally Posted by UK PONY
(Post 297445)
I went for a short drive in part time 4wd & a short drive in full time 4wd high...the same noise occured in both settings.
mike |
i think it sounds like your control arm bushings. probably lowers.
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Originally Posted by Mike1998XJ
(Post 297458)
I think it's u-joints in the driveshaft or Drivers side axel. Your original post threw me though when you said you could hear it when you weren't moving. Just remember to take a long screwdriver or prybar and really put some pressure on those u-joints to check them out. Disreguard the screwdriver or prybar comment if you already knew that...
mike Caged - how would I check those? I'm sure there are all sorts of things wrong with this car, eventually I'll fix them all, but I think the noise sounds like it's coming from a rotating part. |
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