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Driveshaft vibration after all new components except the shaft... 700 1990

posted by  Will740turbo on  Sat Oct 21 00:56 CST 2023
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last visit: Wed Oct 22 16:09 CST 2014
[RELATED]

Final Update:

The problem was a combination of:
Driveline shop bent the shaft while straightening it. 2nd try was fine.
Bad Transmission Extension housing Bushing
Exhaust too close to floor of car because it had been replaced while old soggy engine/trans mounts were in place. New mounts reduced the clearance to 1/4 inch.
Worn bushings in the rear axle Torque Rods - soft but visually looked fine, likely bad due to the bad extension housing bushing letting the shaft wear out the seal and leak trans fluid onto the bushings.

I have not yet put in the new Torque Rod bushings because my shop press is across town, but I'm sure that they are the cause of the minor rumbling that happens rarely now.






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