I just installed a set of RC 2" AAL's. I know that many serious offroaders are not AAL fans. They seemed to be the right choice for my situation. They don't ride bad at all and I actually think it rides a little better that the old saggy springs. I got at least 2" of lift and the Jeep looks great.
Now for the issue: as I have read about other lift installs, I am now feelling a slight vibration. It is steady when cruising but increases when I let off the gas to slow down. 3rd gear seems to be the worst. I know that shims will help. I have searched the topic here on WF but I still have not figured out exactly how to install them. Do I want to install them so as to increase the angle of the drive shaft or so as to straighten the angle? It makes sense to me to rotate the front of the rear axle up so as to reduce the angle. Am I correct? See crude drawing:
Also how many degrees of shim?
Any other thoughts will be appreciated as well.