Rancho 4" lift

[ltsmash]

My son installed a 4" rancho lift on his YJ. It has a lot of vibration that disappears when you push in the clutch, so I'm assuming it's the driveshaft angle. He put in new ujoints before the lift and he put the transfer case lowering kit in, but the driveshaft seems like it still has way too much angle. A friend of mine suggested leaf spring shims to correct the angle. My son doesn't have the time or the money for a SYE and CV shaft right now. Can anyone suggest where to get shims that will work with Rancho's springs and what degree to use witha 4" lift with 31 tire. Thanks in advance.

[olivesta500]

im assuming the jeep has the stock dana 35 rear axle, and most 4 inch leaf spring kits come with 4 degree shims so i would go with 4 degrees.

as for getting shims, if you have an offroad shop in your are they probably have them or can get some. thats where i got mine when i needed them. if you dont have a shop nearby then just look around on the internet for a place that sells them, shouldnt be too hard to come by, good luck