My xj came with a BB but the rear spring were sagging givin me only 1" and no load capacity. So I picked up some S10 spring and installed them this weekend. I had 4.5" with the spring and shackles but it was vibrating like crazy I down bout 30 miles home at 40mph afraid somethin was gonna break. So I put the stock shackles I picked up in and now Im at 3.5" It still has some minor vibrations around 10 and 20-30 mph, nothing I can feel but I can hear the oscillating noise. Is this something to worry bout?

 

I would drive it for a month or 2 and see if they go away, might just be from the new driveline angle.

 

Yea with that kind of lift a t case drop would be a good idea

 

Im pretty certain its from the driveline angle. It wasnt there before I did the lift. I heard that T-case drops can cause problems with the motor mounts. Wondering if a lil vibrations is really bad. i dont wanna fix on issue and create somethin worse.