well here it is. i just put on a rusty's 4.5" lift on my cherokee and i'm getting some bad vibs going 70 mph. i know my u joints are all good i have changed all those this past summer. my diffs are good. the only that i found was that the rear drive shaft where it gose on the t case (splines) i get a little movement out of it. i mean vey little probly moves like 1/8 inch tops. the last thing i can think of is my tires thrown a wieght but tomarrow i'm going to take those to get checked. i've ran out of ideas on what this could be. i've been trying to fix this for the past few days .

has anyone have this happin to them or do they know how to fix it

much thanks!!!!!

 

check steering. check tire pressure, weight, etc.

the obvious thing IMO, is your pinion angle. correct me if i got it wrong, but no where in your post did you mention an sye. check the angle of your rear ds. with 4.5" youd most likely get some vibes.

 

x2

Do you only get vibes at 70 or are they consistent to driving or only when u first take off, and then again at 70?

 

i did find one thing my front drive shaft was wore out and one of my tires was leaking. never noticed it. fixed that and this got rid of most of the vibs in it. so now i'm done with it. just going to see if anything is going to happin and if something breacks i will know what it is then.



i've talk to a few people who put lifts on and they say "you dont need it at a 4.5" lift, but it would help." i'm going to be looking for one now tho


thanks for the help!