we installed a 3.5 rubican lift , then rear driveshaft accell and decell vibration was severe.then installed iron rock hack and tap with refurbished shaft.now the only vibration seems to be at higher speeds, more like a balance problem.anyone have similar problem?

 

I have one right around 57-61 and then it goes away.

 

Papod, what speeds are your vibe at?

HCCAFan, I have a vibe at 57-61 mph on my stock 99 as well, and cannot locate the cause of it to save my life. What year is your XJ and is it lifted? I have replaced all ball joints, shocks, stabilizer, all new u-joints, everything else is tight on the front end.

 

55 up

 

Mine has a 2" budget boost and is a 99 5 speed.