vibrations maybe??
 

im new to jeeps and i have a 2000 cherokee sport...just put a 4.5 rough country kit on it and i installed t-case drop kit.....seems to have vibrations when i accelerate...but gets very noticable around 50 mph.....whats the best thing to do? could it be the rear? or would i need to get a SYE kit? i have the NP242J transfer........sorry for all questions i just want to diagnose the problem correctly so i dont buy parts i don need.........thanks alot guys

Have you gotten an alignment done since the lift was installed?

Where??
 

Where are you feeling vibrations?? Right under you? In the pedal? Gotta give us more here.

But from what you have given us, it sounds to me like bad motor mounts. Take a peak in the engine compartment and have a look at them

yes i have gotten it aligned.....and the vibrations seem to be coming from underneath or rear...........it never did this before i lifted it

its more of a pulsating vibration because its not constant...like in a pattern