J50NWA

Hi,
I have searched but found no real conclusion. Has anyone cured a clunking noise from the rear end?
The symptoms are low speed clunk or thud when going up or down a kerb or over a harsh speed bump. but only on 1 side.
I have replaced the rear anti roll bushes. Wheel bearings were also replaced, as were brake disks (calipers freshened up same time). Its had a new rear strut. My mechanic says the top mount was OK. and I cannot find any untowards movement in the knuckle bushes.
I am at a loss to this, any thoughts would be most welcome,

cheers Jason

mnewxcv

I've noticed this a few times on one specific driveway and never anywhere else. Seems like when I go down it off camber, diagonally is the only time it happens.

Nad1370

It could be the rear axle knuckle bushings making noise.
I had this noise in my RX but the bushing on mine is on the rod side which bolts up to the rear axle carrier.
Here is a link what the bushing looks like:

https://www.clublexus.com/forums/sus...placement.html

J50NWA

thank you for the link, though the control arms and knuckle look different. I thought these, and replacements are available, but if I lift the wheel and try to move, or even use a bar on the control arms themselves there doesn't seem to be any play at all more than the other side that isn't making the noise..

Nad1370

Yes, they look different but the bushing has the same function.

When mine had the noise, i also jacked the side that made the noise.
Had a prybar and pried on those joints at every angle.
I found the play it it but very little.
Like maybe 2mm of play.
But the noise was very pronounce going over slow sharp bumps. (driveway curb)
Drove me nut. lol

Not saying this is your problem but its possible seeing you have replaced the obvious culprits already.

ukrkoz

This is a very tough question but - is that thud on upward or downward wheel movement? Basically, is it when wheel is at the bump/hump apex or when it comes down off it? One is caused by compression, the other one by stretch of suspension elements. Did you check stabilizer bar bushings too?

ukrkoz

Also, is it AWD model? How is rear axles?

Hobbes22

royhanks3

Hey Ukrkoz,

My thud seems to be coming from just as I enter a bump, so when the wheel is in a downward movement. I've replaced my rear struts, rear sway bar links and bushings, trailing bar bushings have also been replaced with PSB 577 from Armstrong Distributors. I have also removed my rear spare wheel all to no avail. My mechanic and I are STUMPED. Do you know what else I could look at to possibly be the culprit of my thud and thunk noises?

J50NWA

Top mounts? subframe to chassis bushes? Exhaust fouling on something?

I have just had the rear trailing arm (chassis end) bushes replaced (I ordered the wrong part), I have now ordered the correct (knuckle bushes) parts, will hopefully be here and replaced by weekend. Will update once done..

royhanks3

Is the "subframe to chassis bushings" called Suspension Subframe Bushing? If so, no we haven't changed those yet. What would the part number be for those? or do you have a blueprint I could give my mechanic to assist in finding that part?

J50NWA

on the following link, TAB-317 *1, TAB-300 *1, TAB-166Z *2 - per side.. I am in the process of replacing these 4 bushes .. TAB317 has already been done, and this has quietened the noise down a lot. I suspect TAB-300 and TAB-166Z will shut the noise up totally..
https://shop.febest.eu/arm-bushing-f...d-tab-317.html

its a long shot but if all else has been done, on this link is the Subframe/ chassis bush
https://www.ebay.co.uk/itm/FOR-RX300...-/172180893607

royhanks3

THANK YOU SO MUCH!!!! I'll get this over to my mechanic today and see what he can come up with and will provide updates once we start fixing stuff

royhanks3

After looking at Ferbest's website even more closely, I've replaced TAB 300 to no avail, my noise is still present after only changing that bushing.

J50NWA

I think the TAB-166Z are the culprits. These are what I meant to change but ordered incorrectly, the correct parts are being delivered tomorrow..