99 TJ drive line vibration on acceleration

[Stevefalk]

Have a 99 tj 4” lift have strong vibration on acceleration, recently swapped from 15” rim to 18” and day later vibration started .no play in rear u joints. Pinion angle from larger rim??
Vibration is only on acceleration as soon as you come off gas it rides smooth.

 

[Jerry Bransford]

The wheel diameter has no effect on the pinion angle. That particular symptom usually means the pinion angle was set too high.

 

[Stevefalk]

just Seems odd that issue started after wheel swap and have never had a problem before. Jeep was bought with lift and have been driving it over a year.

 

[Goatman]

Go get those wheel/tires rebalanced. If the vibe started right after their install then that would be my first place to look. Rotate front to back.
Anytime a problem starts right after you have done a mod then that is always the first place to suspect a problem.

 

[Brianj5600]

@Stevefalk did you go up in tire diameter?

 

[Billy Quan]

I had the same thing happen with my 99 TJ. Rear drive shaft u-joints were the issue.