Driveline vibration after a lift comes from steep u-joint angles. Compare a transfer case drop, SYE, CV shaft and pinion shims, with fixes by lift height.
The XJ Cherokee 4.5-Inch Lift: What a Complete Kit Needs
A complete XJ 4.5 lift needs coils, leaf springs, control arms, a track bar, shocks and brake lines. See the parts, axle limits and tire sizes.