98 TJ 4L, 3sp, w/ 2.5 in lift. Everything was good with the lift, no driveline vibrations. Then I added the following:
CURRIE FRONT TRACK BAR
CURRIE REAR TRACK BAR
CURRIE ADJUSTABLE UPPER AND LOWER CONTROL ARMS, FRONT AND REAR
MOOG UPPER and LOWER BALL JOINTS
SLIP YOKE ELIMINATOR
CONSTANT...