Recently I've noticed a ringing noise coming from somewhere
in the rear of my '87 300SDL at freeway speeds. It's espec-
ially evident when I turn an ear toward the back seat area.
I thought it might be a dragging brake, but applying the brakes
doesn't change anything. And it seems to me that if the dif-
ferential were about to give up the ghost, I'd hear a lower
pitched rumbling sort of noise rather than a high-pitched
Any idea what the cause of this noise might be?
"Kwanzaa bells, dashikis sell, Whitey has to pay
Burning, shooting, oh what fun on this made-up holiday!"
I would check the "doughnuts" that hang the exhaust system.
The other thing I would check is the bushings (I think they are nylon)
on the rear torsion spring/swar bar behind the rear wheels. Do you get
a _clunk_ when your rear wheels go over a speed bump?
not sure what you might mean by 'ringing', but in the even that you might
mean 'whining' rather than ringing like with a bell, it could be your drive
shaft support bearing..... does it get worse when cold?
Richard Sexton <See http://rs79.vrx.net for address> wrote:
Whining would be an adequate description. The sound does have
a metallic quality to it, though.
Yes, it does! And until you asked, I hadn't noticed that the
noise is present when I drive to work very early in the morning
when the temps are in the 30s or 40s, but absent when I drive
home in the afternoon in 60-70F temperatures.
Assuming the noise is from the drive shaft support bearing, is
this something that I should have looked at soon because it could
fail catastrophically and without warning, or can I wait until
the noise becomes annoying? Is it an expensive fix?
Thanks to all who answered.
"GHACK!" -- Saddam Hussein
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