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Another Update, I did some more testing this week end.

I tried something different and shimed the pinion down 3 deg instead of up. It is exactly the same as before. Smooth up to 65-70 then is vibrates, but if you let of the gas the vibration is gone.

So just to refresh memories the tranny is 3.7 down and I have tried the pinion at

+2.5
+1.5
0
-2
-3

All seem to act exactly the same, which make no sense. Guess I need to look into get the drive shaft checked next. It might have to wait until spring.

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