Notices
Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM

Rubicon undercarriage geometry 101

Thread Tools
 
Old Jul 17, 2011 | 06:57 PM
  #1  
RedBeast's Avatar
Thread Starter
JK Newbie
 
Joined: Dec 2010
Posts: 72
Likes: 0
From: San Antonio, TX
Default Rubicon undercarriage geometry 101

I installed a RC 3.25" susp lift (over a year ago) and have seen all kinds of traffic about getting new front and rear trackbars, etc. I really don't know why. Can some help me understand why? Everything has been running absolutely great (knock, knock). I measured the wheel base 95.5" with lift. It is exactly the same as without the lift. Will things (geometry)change when I stuff 37s in?
Thanks
Reply
Old Jul 17, 2011 | 07:04 PM
  #2  
ChopN's Avatar
JK Super Freak
 
Joined: Mar 2010
Posts: 1,455
Likes: 0
From: South Lake Tahoe
Default

Trackbar centers your axle under the jeep. Look at the drivers side and passenger side tires. The passenger side should stick out more than the drivers side without an adjustable trackbar or extension bracket. Measure the difference if you can't see by eye.
Reply
Old Jul 17, 2011 | 07:08 PM
  #3  
RedBeast's Avatar
Thread Starter
JK Newbie
 
Joined: Dec 2010
Posts: 72
Likes: 0
From: San Antonio, TX
Default

I am getting 5.38s but haven't decided what brand, suggestions? Then the next dilemna is finding someone to do the work . . . the right way. I might default to a dealer even though it might cost me more money. I just want it done right.
Reply
Old Jul 17, 2011 | 07:10 PM
  #4  
RedBeast's Avatar
Thread Starter
JK Newbie
 
Joined: Dec 2010
Posts: 72
Likes: 0
From: San Antonio, TX
Default

I looked at the spacing from the outside of the tire to th inside of the wheel well. I didn't measure it but they look very close if not right on. Should there be a difference since the lift was added?
Reply
Old Jul 17, 2011 | 07:22 PM
  #5  
RedBeast's Avatar
Thread Starter
JK Newbie
 
Joined: Dec 2010
Posts: 72
Likes: 0
From: San Antonio, TX
Default

OK, then I need to measure!! My eyes are only calibrated by 1' increments. Have I been causing damage or extra stress on other parts? Should I look for wear in other areas?
Reply
Old Jul 17, 2011 | 07:30 PM
  #6  
RedBeast's Avatar
Thread Starter
JK Newbie
 
Joined: Dec 2010
Posts: 72
Likes: 0
From: San Antonio, TX
Default

Thanks karls10jk!!
Reply
Old Jul 18, 2011 | 04:43 AM
  #7  
mjones's Avatar
JK Enthusiast
 
Joined: Jan 2011
Posts: 318
Likes: 0
From: Dela Where?
Default

Originally Posted by karls10jk
Trac bar brackets could be stressed to the point where they may break but there are people who have had issues with stock setups. An adjustable trac bar would be good up front and in the back. And a company (can't recall which) sells a reinforcement kit that introduces some new metal into the mix to strengthen things up.
JKS and I believe ORE does as well. I helped install the JKS kit with their track bar. Its very nice and sturdy. I have the rear bracket from Teraflex its plenty strong, if you chose not to run an adj TB on the back.
Reply
Old Jul 18, 2011 | 10:45 AM
  #8  
RedBeast's Avatar
Thread Starter
JK Newbie
 
Joined: Dec 2010
Posts: 72
Likes: 0
From: San Antonio, TX
Default

I am going to replace both. I have seen both JKs adjustable F7R for $338.
Reply
Old Jul 18, 2011 | 11:58 AM
  #9  
mkjeep's Avatar
JK Jedi Master
 
Joined: Aug 2007
Posts: 15,665
Likes: 4
From: Hammond Louisiana
Default

Just to throw this in , adj TB or not, it's a good idea to reinforce both front and rear axle mounts. They are barely welded on from the factory.
Reply




All times are GMT -8. The time now is 08:04 PM.