Nolan,
Would there be any method of telling whether or not the drive shaft was
re-installed 180 degrees out?
I seem to have the same type of vibration; starts at about 35mph.
Recently replaced all 4 u-joints, the drive shaft, was of course, completely
out for a time...didn't vibrate prior to that.
And, as far as that goes...is there some hints on how to do the hose clamp
balancing trick?
John
'75 Spit
-----Original Message-----
From: owner-spitfires@autox.team.net
[mailto:owner-spitfires@autox.team.net]On Behalf Of Nolan Penney
Sent: Saturday, September 09, 2000 7:11 PM
To: Stephane St-Amant
Cc: Triumph List; Spitfires List
Subject: Re: Fw: Shaky Spit - Update + Solution
I'm quite impressed! I've never been able to pull that off myself. I
understand the theory, but I fail always on the execution (as all my
wobbling
ceiling fans attest).
As you've now noticed, vibration can really transmitt down a shaft. You
previously swore you were seeing bent drive shafts, and they weren't. Worn
u-joints give the exact same false presentation. I just had a car over here
to
replace the driveshaft with one of my spares. The car had been diagnosed by
a
competent experienced mechanic as having a bent driveshaft. I couldn't see
it,
but wasn't going to argue (I'd already had my chance on this car, and
couldn't
determine the problem conclusively). Once the inner flange was free, it was
only then real obvious that the u-joint was dead. Since it was a training
session for the cars owner, it was bolted back on and the u-joint
re-inspected...no play was detectable.
If you find yourself really bored on weekend, and like pressing u-joints,
you
might want to rotate the flanges at each end of the drive shaft.
Driveshafts
don't normally just go out of balance. They either get hit, or they are put
back together 180 degrees out when a u-joint is replaced. Though your
hoseclamp
balancing job is perfectly valid. After all, the factory just spot welds
some
weights onto the tube.
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