Need help! Squealing From Under Car
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Joined: Aug 2003
Posts: 62
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From: California
Need help! Squealing From Under Car
Fellow Forum people, your help is desperately needed! My 2000 SC400 has developed a transitory, intermittant squealing noise in what sounds like the underside of the front portion of the car, near the front wheels. The noise sounds like a squeeky hamster wheel, not too loud but persistent and clearly audible when it shows up. When I've taken it to the dealer, I can't duplicate it for the tech. This is driving me nuts. It seems to happen mostly between 15-35 mph; mostly at the end of the driving day; mostly on smooth roadway on a gentle up or down grade. At first I thought the front end just needed a lubrication, but the service manager assured me that this wasn't the case. I drove him around for 15 minutes, and (of course) the noise didn't pop up. Arrgh! Has anyone experienced this before? Any ideas? Bad bearings? Bad shocks? Any ideas and possible fixes will be gratefully received! Thanks! Paul
Pole Position
Joined: Apr 2004
Posts: 201
Likes: 0
From: California
same problem on my sc300...it annoys the crap out of me...sometime it shows up and sometime it doesn't.
I think mine is coming from the brakes because everytime I brake the noise goes away and when I release the pedal it comes back.
I think mine is coming from the brakes because everytime I brake the noise goes away and when I release the pedal it comes back.
Lexus Test Driver
Joined: Aug 2003
Posts: 1,019
Likes: 5
From: New Hampshire
Originally posted by JamesN
Check the brake and the 2 caliper pin. it might need some grease. good luck
Check the brake and the 2 caliper pin. it might need some grease. good luck
Thread Starter
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Joined: Aug 2003
Posts: 62
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From: California
Squeaking and squeeling
It usually comes on closer to the end of the driving day rather than the beginning. It's always associated with acceleration under low throttle; it does not appear under braking. Does this change your diagnosis?
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Thread Starter
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Joined: Aug 2003
Posts: 62
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From: California
B1TEM3, did that lube solve the problem? I did all the brake work last week at my local dealer, including new brake pads and lubing the caliper pins, but the problem is still there. How did you figure out what it was?
Lexus Champion
Joined: Mar 2004
Posts: 1,973
Likes: 10
From: Arizona
Drown the sway bar rubber bushings (4) with Areospace 303 or Vinylex. Work it into the pivit point body mounts and the bar end bushings. If needed, remove both end mountings to swivel the bar on the mounts.
Many types of grease may break down the rubber in the bushing. Rubber preservatives or protectant may be a better choice.
Many types of grease may break down the rubber in the bushing. Rubber preservatives or protectant may be a better choice.
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