Howdy!
"Pestka, Dennis J via EV" wrote:
I don't know if this means anything, but let me repeat one thing.
Under acceleration with torque on the motor and drivetrain the
vibration is not too >bad. Starts showing up ~ 55 mph. When you let
off the accelerator at that speed, the vibration gets very bad and
>gradually goes away as the vehicle slows down to ~ 40 mph.
Long ago in another lifetime I was a dealership auto mechanic and
the first thing that I would check for vibrations that were a function
of weight transfers and tire loading were the tires themselves. Not so
much wheel balancing as the structural integrity of the tires. Since
this can be difficult to see unless you're lucky the easy test was
always to swap the front wheels with the rear and observe if the
symptoms changed in any way. I have found this procedure to reveal bad
tires on several occasions and I've always assumed that the tire had
some type of internal damage or belt separation. It's relatively easy to
check and has saved me from chasing much more complicated problems.
Good luck!
--
Kevin Flaherty
Lurker and EV-wannabe for many years now
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