Front driveshaft
 

ok i been lookn for the vibe in my front end for A lil bit now tried tires still the same new track bar same ,new bushing everywhere same, new axle ujoints still the same,, i take my front drive shaft out the vibes are all gone, the ujoints all seem fine in the DS, the only thing i see is at the slip there is about an 1/8" side to side play, could this be my vibe? or could the DS bent?,, it only has a 3" lift with 31, all terrains,,

Yes, the slip yoke can cause vibes.

Might also check your pinion angle, but at that much lift if you're using stock control arms that's probably not it. Just another thing to check though.

Don't overlook the centering ball on the CV either. Yes it is replaceable.

i did a 1" TC drop everything on the DS seems tight all but the slip has the movement, im gonna see if i can get another one from a buddy to try who knows i guess,

T-case drop puts the front drive shaft in more of an angle and if it isn't balanced perfectly you will get vibes. That's why t-case drops are a band aid for SYEs.

well i just picked up another DS from the JY for 25 bux the slip it MUCH tighter than mine, so gonna head out and put it and hit the highway,,

the new DS did the trick my jeep is smooth as glass at to 80mph