Rear driver side "sha.sha.sha.sha"

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A

Adrian

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Oct 9, 2003
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14
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37
Location
HOFFMAN ESTATES, IL
2002 131k mi. Recently done rear caliper, rotors, pads. When going slow and cocking steering wheel to right a little, soft hollow metal grinding sound from rear driver side. Went to the dealer to check. They told me rear axle wheel bearing might be causing issue? I didn't think wheel bearing made the hollow sound as they are internal... They wanted to charge $480 to dissect my LC for further inspection!!

I am stumped as I have took apart caliper, rotor, and pads to see if anything was rubbing. I see a faint metal scraping on the backing plate from rotor, but it should not make a sound when turning slight to the right. Any idea where I would need to look? Is the dealer diagnosis seem correct?
 
Happens all the time when rear rotors are changed. My 2000 did it too. Had to drive it for a while to wear some metal away where the rotor contacts the backing plate. I work at a toyota dealership and see this often. The tundra does it too. In fact there is a service bulletin related to this for the tundra.
 
^ experienced same here. And check the top portion of the dust shield/backing plate as they can easily be bent...also giving metal on metal sound...

Although I have experienced rear axle seal failure numerous times I have not seen a worn axle/hub bearing on our semi-float rear axle bearings: They are very stout, long lived and generally not a problem...until seal failure that leaves tell tale sign(s).
 
Thanks for the reply. I did take a look at the backing plate, but it seems there are no rub marks or scrapping evidence. Also, this only happens when slow speed turning slightly to the right. Going straight or turning left, no sound. This is what bugs me that when turning slightly, makes the noise..
 
If a little wearing in doesn't do it, I would check the caliper slide pins and make sure both on that side are free and lubed. Any bind there will hold the pad in contact with the rotor as well producing the same sound.
 
AimCOtaco said:
If a little wearing in doesn't do it, I would check the caliper slide pins and make sure both on that side are free and lubed. Any bind there will hold the pad in contact with the rotor as well producing the same sound.
Click to expand...

It makes sense. I have brand new caliper(reman) on both rear and I do know the top pin was easy sliding but the bottom one with the bushing had little resistance on sliding. Does the bottom pin also should be easily sliding as well?
 
TTO5 said:
Look again on the left rear backing plate especially where there is a lip. You should see where it's been rubbing
Click to expand...

Thanks. I will check again today but it just does not make sense to me that ONLY time I hear the sound is slight right turn on slow speed. If something was in contact metal to metal, I should be hearing all the time....
 
OK. I have taken apart rotor, caliper, pads and inspected all around and over. No rubbing marks on the backing plate, all pad clips installed correctly, no score marks on the rotors, pads are even, caliper pins are smooth. Cleaned with brake cleaner and reinstalled back. Test drove, and the sound still exists!! Slight right turn on slow speed. I am stumped now. I don't know what else to look for....
 
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