2006 LJ Rubicon Vibration Problem
Thread Starter
JK Newbie
Joined: Nov 2009
Posts: 28
Likes: 0
From: Jacksonville, NC
2006 LJ Rubicon Vibration Problem
OK, here's what I've got...
06 LJ Rubicon. 4" lift on 33 MTZs. Auto. Bought it with the lift on it, it was a RC Series II lift, and couldn't stand the ride, so I replaced the shocks with some Skyjacker Nitros, Rock Krawler Bomb Proof trac bar and drop bracket, drop pitman arm, new stabilizer, and replaced the fixed lowers with Currie JJ Adjustables because the bushings were shot. Just had it aligned and tires balanced. Dialed in pinion angles, rear pinion is within 1 degreed of Tcase output shaft, front CV shaft is inline with front pinion.
It had a Tcase drop on it, but had some wicked vibes so I removed the drop, and it got a little bit better. Problem is, I still get a pretty good vibration starting around 45 and smoothing out around 60, but not totally going away.
Tried shifting into neutral when the vibes hit, they persist. Tried turning off overdrive, no luck. Checked all the bolts, everything is torqued to spec. I'm running out of ideas, and getting very frustrated. It's my daily driver, so I can't afford to have it down for more than a night at a time, or a weekend. And it's even more frustrating because the majority of my driving is within the speed range of the vibes.
I need some ideas...:gaah:
06 LJ Rubicon. 4" lift on 33 MTZs. Auto. Bought it with the lift on it, it was a RC Series II lift, and couldn't stand the ride, so I replaced the shocks with some Skyjacker Nitros, Rock Krawler Bomb Proof trac bar and drop bracket, drop pitman arm, new stabilizer, and replaced the fixed lowers with Currie JJ Adjustables because the bushings were shot. Just had it aligned and tires balanced. Dialed in pinion angles, rear pinion is within 1 degreed of Tcase output shaft, front CV shaft is inline with front pinion.
It had a Tcase drop on it, but had some wicked vibes so I removed the drop, and it got a little bit better. Problem is, I still get a pretty good vibration starting around 45 and smoothing out around 60, but not totally going away.
Tried shifting into neutral when the vibes hit, they persist. Tried turning off overdrive, no luck. Checked all the bolts, everything is torqued to spec. I'm running out of ideas, and getting very frustrated. It's my daily driver, so I can't afford to have it down for more than a night at a time, or a weekend. And it's even more frustrating because the majority of my driving is within the speed range of the vibes.
I need some ideas...:gaah:
Thread Starter
JK Newbie
Joined: Nov 2009
Posts: 28
Likes: 0
From: Jacksonville, NC
Well, here's the latest. I pulled the rear shaft and drove in 4wd, and vibe was nearly gone, definitely much less. So I figured it had to be the rear and checked the angles again (the were still good), put the shaft back in, and in 2wd the vibes were back in force. Then I put it in 4hi with both shafts in, and vibes nearly non-existent, similar to what I had with only the front shaft in. So I'm guessing it's gotta be the front, not the rear.
With a CV shaft, pinion angle needs to be in-line with the drive shaft, correct? Or should I go +/- 1-2*? I guess just to verify its the front tomorrow I will pull the front shaft (PITA) just to verify that's what it is unless anyone has any other ideas...
While I've got the front shaft off, I'll check the joints, the rear were good...
With a CV shaft, pinion angle needs to be in-line with the drive shaft, correct? Or should I go +/- 1-2*? I guess just to verify its the front tomorrow I will pull the front shaft (PITA) just to verify that's what it is unless anyone has any other ideas...
While I've got the front shaft off, I'll check the joints, the rear were good...