I had a similar condition in my TR6 that was getting louder over time but
my differential was fairly new...greasing the U joints in the rear axles
cured that noise (all my UJs have grease nipples). I had let them run
about 7K before greasing, as they are difficult to get to with a normal
grease gun. I ended up filing down a 90 degree grease gun adapter for
Chrysler FWD for the ones by hub and using a "pin" style head to do the
ones by the diff, as a regular grease gun nozzle doesn't really fit. The
noise could be a bunch of other things (diff, wheel bearings), but you
might want to try this cheaper/easier approach first to rule out the UJs if
you have grease nipples. In general, using UJs in independent suspension
axles was quickly superceded by CV joints, as the high amount of movement
in the axles really stresses a UJ (vs. in a driveshaft). If you have a lot
of miles on sealed-for-life UJs, you may want to consider changing them if
you don't find an easy answer.
cut---------------------------------
Date: Thu, 23 May 2002 18:53:34 -0400
From: "Jim Davis" <jdavis344@directvinternet.com>
Subject: TR6 noise
One of my TR6s has a whining noise that I believe is coming from the
rear end. It has the same pitch as a semi tire whine. It is more
noticeable above 60 mph and seems to increase with speed. It is louder
on acceleration and goes away when just letting off the gas, as in going
down hill on the interstate but not really decelerating, just keeping a
steady speed. Is this a differential noise? From the cockpit I can't
tell where it is coming from. I've had cars with a differential whine
and it is similar. I've never had a TR6 diff. go, so I don't know what a
bad one sounds like.
Any ideas?
Jim Davis
Fortson, GA
CF38690UO
CF37325U
William Whitmoyer
69 TR6
72 Fiat Spider
90 BMW iX
91 CRX Si
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