U-joints "thump" ? What was the "rate" of the thump? And what is the RPM?
I would think the term used would be more like "vibration" - "thump" implies
that its not following the rate of the turning drive shaft.

For me it was a resounding "THUMP" every few seconds, at about 1000-2000 RPM,
went up to 3500 it went away; went back down; didn't happen again.


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