Hey all,
Several months ago I posted a problem I was having with my GT6,
namely a vibration that came on at higher speeds. Many thanks to all
of you who responded. Yes, it was my driveshaft that was out of
balance. My first attempt at a fix was to unbolt one end and rotate
180 deg. It sounded like a good idea to me, but it didn't work. The
next attempt involved 3" dia. hoseclamps used as balancing weights.
This did help somewhat and confirmed the out-of-balance hypothesis.
I then remembered that I had a spare driveshaft stowed away. After I
swapped the driveshafts I took the car out for a spin - it felt
smooth all the way to 90 mph.
Last week I finally got around to taking the original driveshaft
to a shop for balancing. The next day I plunked down $43 and got my
repaired driveshaft back. The man behind the counter said it was
badly out of balance and the sliding yoke piece had been bent, so he
straightened and balanced it. "And oh, by the way, this yoke is
installed 180 out - the zirk cutout is here, and the zirk is over
there". Armed with this bit of info, I went back to the shop that
replaced the u-joints in the first place. Greg, the mechanic at
Kat's British Cars, said A) having the yoke 180 deg out will not
affect the balance of the driveshaft and B) they in no way bent the
sliding yoke, even though the only symptoms the car displayed before
they "fixed" it was a rattle during acceleration.
Finally, my questions. Can reinstalling the yoke 180 deg out
from where it was previously really affect the balance? How does a
driveshaft get bent? Does anybody now of an honest LBC shop in the
Denver area?
Sorry about the long post
Karl Theis
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