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

posted by  Will740turbo on  Sat Jan 7 01:20 CST 2023
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last visit: Wed Oct 22 16:09 CST 2014
[RELATED]

To clarify, so far we have:

New engine and transmission mounts plus used (about 40k miles) KYB Gas-A-Just Shocks on the rear
--Vibration started.
--New universal joints, carrier bearing, and carrier bearing support.
--New metal on metal noise started (failed bearing inside rear end)
--Installed used whole axle
--Still vibrating at particular highway speeds, but only occasionally
--Shaft balanced (some weights are huge, was told the shaft was bent near the splines)
--Vibration different but still definitely present


Ideas
? Bad front struts causing weird angle in the rear pinion
? Bad/worn rear torsion rod bushings (or poorly installed since I did it in a rush and tightened them with the car in the air) causing bad angle on the rear pinion
? Bad tailshaft bushing - lots of oil on the transmission, but seems like it is engine oil and not trans fluid





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