My driveshaft is still vibrating a bit, contrary to my post a few months ago. Dang. I checked the angles between the driveshaft, transfer and axle and they're 9 and 12 degrees respectively. My question: at these angles do I need to go to a double carden shaft? I'm wondering if the axle is over-corrected and needs a 1 degree shim. I've been reading drivesaft sites and they seem to think a 1.5 to 2 degree correction is what's needed. I've got Rough Country springs in the rear, needless to say - stiff as hell. Anyone else solved a similar problem. Anyone got a 2" - 4" lift with standard drive shaft and no vibration? Anyone solved the problem by replacing old, worn shock absorbers?