There may be some shims missing where the carrier bearing bolts up. I know it's rubber mounted but it still needs to be sort of square to the bearing itself. The cushion mounting allows for the upward motion of the rear end and vibrations. I would also check the carrier bearing itself for correct dimensions and installation.

Gas drivlines (3000rpm) should never exceed 60" ctr/ctr and 72" is correct for slower((2000rpm) turning diesels. Runout should not exceed .005 at the yoke and .010 in the middle of the shaft. If this is maintained and the phasing is correct you will not have a vibration problem.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
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Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain