Join Date: May 2008
Location: Grand Junction COlorado
Feedback: 0 reviews
I have a 2dr Rubicon with a 3" Teraflex lift. We also installed front spacers to level out the front JK lean. Installed Tom Woods front and rear shafts. Have lower front and upper rear adj. control arms and have adjusted the rear dif so that the pinion is in line with the driveshaft. No issues. The front is another issue. I have a vibration that starts at about 60mph and seems to be the worst in the 62-68 mph range. Checked the front end, adjusted caster, camber etc and couldn't get the vibration out. Had a little play in one of the u joints so after discussion with Tom Woods sent the front driveshaft back. The replaced all three u-joints and rebalanced. Sent it back promptly and all at no charge. Vibration is slightly less noticable since my install yesterday. However it already is getting worse (don't understand why). Not sure what my next step is going to be.
How many degrees of caster are you running. If I recall factory specs are 4.6 degrees. I found that when I ran stock driveshafts after my lift I could run 6 degrees and it had a very stable on-center feel to it. After I went to aftermarket driveshafts I felt a vibration in the front. I dialed the caster back to 4-4.5 and it went away. The front is not near as critaical as the back for vibration because on the road it is coasting and unpowered. Off road when it's powered the speeds are lower so it isn't an issue. I doubt I'd go to a double CV. You could always have your knuckles cut and rotated too.
08 JKU Rubi, GM 6.2 LS, 6L80 6 sp automatic, Atlas 4 sp TC, Dynatrac ProRock 80 rear and in front PR60 w RCV shafts, DynaLock w Stub hubs, 4.88 gears and ARB Lockers, 4.0" lift, Synergy Long Arm, King coilovers, 40" Nitto's, Hutchison Rock Monster wheels, GenRight alum bumper and fenders, GenRight 20 gal aux gas tank, PSC steering, Warn Zeon 12K.
2nd Jeep is a 2014 Grand Cherokee Overland with a 5.7 Hemi, Quadra-Lift Suspension and Quadra-Drive II. My wife says I can't do anything to it!