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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