Vibration on '92 Q45-

[Haitian_King]

Not bad. Any special tools? Is this detailed in the FSM?

[goody90q45]

Not bad. Any special tools? Is this detailed in the FSM?

You need a bottle jack or equivalent to support the transmission while you've got the mount out. Other than that there's no special tools or alignments required. Really there's not much need for an FSM- very straightforward. It's all righty tighty, lefty loosey. It was one of my first DIY's.

[96Qowner]

Also had local shop check out the driveshaft alignment. They thought it was out ( from transmission repair) but changing it did not affect the vibration. They even tried a couple of orientations with no success.

It sounds like you've been Searching, so I assume you've run across the problems with fiddling with the "guibo"?

Sounds like you're describing the guibos at the very tip of the driveshaft... I have plenty of them at home but they are worth a damn since once removed from the shaft, they lose balance. Thats why many times you see paint on the bolts as a marker. The service manual actually tells you not to mess with em.

zerothread?id=249209

zerothread?id=276940

Read Drew's posts on this thread:

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and here:

Driveshaft vibration is not constant. At very slow speeds you'd never know. When mine went bad, it vibed in the 35-55 mph range, then again and roughly 80-90 mph. This is commonly seen.

zerothread?id=237244

If you've already read these threads, my apologies, but it will be helpful for future Searchers

Also, that bent wheel ... you ruled it out ... how?

The transmission mount and exhaust hangers won't cause the vibration bands you're talking about. So ... it sure sounds like something in the driveshaft assembly.