Finally I have a chance to give back to this great Forum with a tip about our raised Jeeps developing vibration!
'97 Sahara, 4.0L, 5sp, 35x12.50, NP231, 2" BL, 3" TeraFlex suspension lift:
Issue was extreme vibration. 1) put lift kit on, then 35" tires (on/off road tread) 2) vibration began 1 or 2 mo.s after 3) changed clutch (NAPA Perfection) which removed a lot of vibration but not all 4) changed motor mounts 5) rotated and balanced tires 6) SYE / short shaft installed.
All the above helped but did not remove this darned vibration.
I should say along with the lift kit ( a yr ago) the shop added 2" aluminum spacers to lower the trans cross-member. When the SYE was put on, they romoved them. The vibration associated with taking off from a red light and going in reverse was better but now I feel a different vibration: the jeep feels like a truck....you can feel the drive train telegraphing its energy thru the steering column, the SEAT, thru the floor. I know I sound like a tourist but I believe Jeeps don't have to drive like this just because they are lifted and have bigger tires!
I had a thought: put back the alum spacers to do 2 things: help straighten the geometry a little more betw the trans and the aft rear and the alum would help absorb the vibration.
Not hoping for too much I put them back on took it out for a test drive and couldn't believe how much better it drove!
It almost feels as smooth driving as a factory Jeep.
Well, that's my little tip, email me at: firstname.lastname@example.org
(Mesa, AZ) if you'd like more details.
My Sahara and me have the power again: