Driveshaft unbalanced

[ccarlozz]

Removed the driveshaft to work on subframe. Reinstalled and now there is a significant vibration. I'm thinking the driveshaft is unbalanced. What end will I need to adjust? The guibo side, at the diff or both? Also how can I tell when it is installed correctly? Trial and error by starting the car each time?

Thanks.

[jlevie]

There should be a paint mark on each half of the drive shaft at the join. Match the marks and the drive shaft will be in balance.

[ccarlozz]

There should be a paint mark on each half of the drive shaft at the join. Match the marks and the drive shaft will be in balance.

Thanks so much. I'll give it a try tomorrow. Your posts have been helpful on more than one occasion!

[DesertBMW]

Removed the driveshaft to work on subframe.

Thanks.

What did you do to subframe?

[ccarlozz]

What did you do to subframe?

Dropped it to install subframe bushings, rtabs, and springs.

[DesertBMW]

Dropped it to install subframe bushings, rtabs, and springs.

if you installed heavier duty bushings more vibrations would be transferred to the chassis.

[ccarlozz]

if you installed heavier duty bushings more vibrations would be transferred to the chassis.

Understood. It actually turned out that the CSB mount was loose. Tightened it up and now there is no more vibration.

Thanks again.