Dave Terrick writes:
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Yee Haa!
My GT6 has lost its' shakes!!!
Thanks largely in part to the thread on driveshaft balance (thanks Scott) I
dropped the best hundred bucks I could have on said driveshaft.
I took the spare in and had it balanced and new u joints installed. They
said it was "pretty bad". It appeared to have the original balance weights
on it and the joints seemed tight but hey, it's a b@#$h to do on a GT6 so
why cut corners.
The old shaft - with 10k miles on new joints I installed myself at
considerable effort - showed 2 loose joints. I suspect it too is bent,
being an ex-race piece.
The car now passes 75 mph with no hint at all of vibrations. What a
transformation!
For those interested, a tip. A wheel balance problem shows up at a given
speed and disappears once past another speed, depending on severity of
problem. A driveshaft imbalance shoes up and never goes away, and may get
worse. I am wondering if the bad driveshaft knocked out the u joints I put
in.
Next time you do the drivesahft, save the aggro. and have your generalist
machine shop do the work and get the balancing done too. It makes a world
of a difference.
Dave Terrick
69 GT6+
Winnipeg
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I did the same thing with my TR6. I even swaped diff's (for other
reasons) and the symptom stayed with the car. Finally I took the
shaft to a shop and they showed me how my almost new (but cheap QH)
U-joints had axial play. They replaced them with Hardy-Spicer joints
and balanced the shaft and Wow, what a difference.
Great. Now on to the other problems.
Dave Massey
St. Louis, MO USA
(Winnipeg in 2002)
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