tires can be out of round and/or out of true and still be balanced.
these "perfectly balanced" tires will still give you vibes.
(i once bought 5 wheels and tires off of a friends new J**p just to
get the wheels, only to find that only 2 of the brand-new original
low-end Goodyears on them were round and true; there was no way to put
any 4 of those on the ground without getting shimmy, shakes and/or vibes.)
what kind of tires did you have on there when this was first
noticed? and what kind of tires do you have on there now?
sounds like you already know you have at least one tire (on the
rear) that's out of round; i'd suspect that since you feel the vibes in
the steering wheel you also have one (or more) that's out of round
and/or out of true on the front.
get them up in the air and watch both the tires and the wheels
while they spin to see i they even spin roundly and without any
side-to-side wiggling.
cheers!
e
On 17/Dec/13 05:47, Ralph Robertson wrote:
This topic made me resurrect my vibration/wobble problem with my '87
300SDL. Ever since I bought this car, I have had this problem and 5 years
later I still have it. I have replaced everything I can think of in the
drive train and still have the shimmy. Although it seems a lot better than
original, and it should be! Is there anything in the diferential that
could cause this? Even had the rear half axles replaced. My latest
effort, the mechanic made some adjustments to the torgue for the rear axles
and suggested it may have a differential issue. Is there a possibility a
previous car accident may have caused this? I am rather frustrated at this
minor shimmy after putting all this money and effort into this, but it
still shakes the steering wheel at speeds above 55mph, very smooth below
this speed.
"parts addressed"; rear sway bar links., rear axles, drive shaft
balanced,all flex discs, s-support, rubber mounts, motor mounts,tires,wheel
balances,rear springs, transmission output shaft bearing.
The shake can be felt in the steering wheel, just like wheel balance.
Starts around 55mph, slakens off around 60, then comes back about 65 and
seems to come and go at all speeds above that. Was quite strong, but now a
minor shake but still aggravating on a long trip. Tires all seem to be
wearing evenly, no scalloping.
The car is in such great shape I hate to change it, and would rather fix it
than swap.
Ralph '87 300SDL
'85 300 CD
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