Question about lift and vibrations
I installed a RE 4" lift on my yj. I also installed the TC drop kit that came with it as well as the 4* shims. I have vibrations in 4th and 5th gear AND 5th gear seems to have no power. I measured the drive line angles as best I could and got a reading of 6* at the TC and 9* at the rear. It would seem that my pinion is too high correct (SHOULD be 6-2=4 if I have studied correctly) So, I would assume that removing the 4* shims SHOULD get it a lot closer to correct and lessen the vibrations. (assuming that removing the 4* shims puts the rear angle at 5*)
Here is my dilema. Two days ago I carried two bicycles on a rear hitch bike rack to work with me. I noticed as I drove that there were NO vibrations and 5th gear had plenty of power (never bogged down even climbing small grades) Seems to me adding weight to the rear of the jeep would raise the pinion angle which totally contradicts needing to remove the shims.
Or am I just confused ? (and maybe stuck carrying a loaded bike rack around all the time :~> )
All help appreciated,
1994 YJ, 4.0, 5 speed.