Hey guys I have a 96 XJ Sport I just installed a 3" RC with lower control arms and real add a leafs. I had some decent vibrations around 35 to 50 especially when I let off the gas, So I dropped my TC 1" using Grade 8 washers stacked and welded together since the drop didnt come with the kit.
85% of the total vibration is now gone, and when I let off the gas the vibration has gone but theres still some vibration around the 35 to 50mph mark, but more so around 65 now.
The front drive shaft is the double cardan style, and the front U joint has been replaced by me, I had no idea how to change to 2 on the other end so left them be. But appear to be in good shape, no slop or anything.
The rear drive shaft has to rubber boot on it going into the Transfer case,not sure the name of that style of drive shaft but none of those U joints have been replaced. Appear to be in good working order.
Im running a new set of Cooper STT's 31 x10.5 x15's on stock steel Jeep wheels.
And I havent had a front end alighnment since the tires or the lift kit, was trying to wait till I replace the track bar and other steering components with heavy duty gear.
So any ideas would be of great help guys