Post by timbillyosu on Jun 27, 2012 22:31:19 GMT -5
Ok so, short story:
I installed a Rock Krawler 2.5" Flex system on my 2010 Rubicon. Drove fine for 2 days then started having jounce induced death wobble.
Long story:
I started the install last Fri night doing the front end and finished the rear on Saturday morning. I drove it around town and such Saturday and then made the 1.5 hr trip home from my parents' with no problems. To and from work Monday way fine. (I drive 32 miles on the highway each way for work. The roads in Virginia Beach are probably some of the worst highways in the US.) Tuesday morning on the way to work, I noticed a little wobble, but nothing serious. On the way home Tuesday, I noticed a bit more wobble when I hit bumps. It was to the point that I had to slow down to less than 40mph to make it quit. Wednesday morning, if I hit any bump going more than 35, it starts trying to shake itself apart until I slow down to almost a stop. I got about .5 miles from the house and decided it was too dangerous to try so I turned around and switched cars. Did my research today and read through every post I could find on here and other sites on how to fix it.
Tonight, I went through all the steps that I have read. I started with the trackbar. I replaced the bolts with 9/16", made sure the axle was centered, torqued everything to 140 ft-lbs. Next, I went over the tie-rod ends, steering box, and drag link. I laid under it and grabbed each of the joints and tried to shake and move it up and down. All of them were tight. I had a friend start it and turn the wheel back and forth while I was feeling/listening to each link. I felt a little clunk, but I think it was just the play from reversing directions.
I took it to a shop and had the alignment checked. It was a little off so they adjusted it. The final numbers were:
Left: -0.5 deg Camber, 5.3 deg Caster, 0.10 deg Toe
Right: -0.4 deg Camber, 5.1 deg Caster, 0.10 deg Toe
Total Toe 0.20 deg, 0.0 deg Steer Ahead
When I did the install, I didn't relieve the preload in the Upper Control arms. After the alignment, I loosened all of the Upper and Lower control arm bolts, shook the hell out of the Jeep, and tightened everything to 120 ft-lbs.
Next, I lifted each side and inspected the upper and lower ball joints by rocking and moving the tires. None of them moved.
After all this, it will still shake like hell if I hit a bump/pothole if I'm going over 35.
My list of things that could be causing the issue is becoming short
Does anyone know of anything else I am missing and should check?
I installed a Rock Krawler 2.5" Flex system on my 2010 Rubicon. Drove fine for 2 days then started having jounce induced death wobble.
Long story:
I started the install last Fri night doing the front end and finished the rear on Saturday morning. I drove it around town and such Saturday and then made the 1.5 hr trip home from my parents' with no problems. To and from work Monday way fine. (I drive 32 miles on the highway each way for work. The roads in Virginia Beach are probably some of the worst highways in the US.) Tuesday morning on the way to work, I noticed a little wobble, but nothing serious. On the way home Tuesday, I noticed a bit more wobble when I hit bumps. It was to the point that I had to slow down to less than 40mph to make it quit. Wednesday morning, if I hit any bump going more than 35, it starts trying to shake itself apart until I slow down to almost a stop. I got about .5 miles from the house and decided it was too dangerous to try so I turned around and switched cars. Did my research today and read through every post I could find on here and other sites on how to fix it.
Tonight, I went through all the steps that I have read. I started with the trackbar. I replaced the bolts with 9/16", made sure the axle was centered, torqued everything to 140 ft-lbs. Next, I went over the tie-rod ends, steering box, and drag link. I laid under it and grabbed each of the joints and tried to shake and move it up and down. All of them were tight. I had a friend start it and turn the wheel back and forth while I was feeling/listening to each link. I felt a little clunk, but I think it was just the play from reversing directions.
I took it to a shop and had the alignment checked. It was a little off so they adjusted it. The final numbers were:
Left: -0.5 deg Camber, 5.3 deg Caster, 0.10 deg Toe
Right: -0.4 deg Camber, 5.1 deg Caster, 0.10 deg Toe
Total Toe 0.20 deg, 0.0 deg Steer Ahead
When I did the install, I didn't relieve the preload in the Upper Control arms. After the alignment, I loosened all of the Upper and Lower control arm bolts, shook the hell out of the Jeep, and tightened everything to 120 ft-lbs.
Next, I lifted each side and inspected the upper and lower ball joints by rocking and moving the tires. None of them moved.
After all this, it will still shake like hell if I hit a bump/pothole if I'm going over 35.
My list of things that could be causing the issue is becoming short
Does anyone know of anything else I am missing and should check?
No way should you have deflection like that. Is there a sleeve inside the bushing?
