The RockJock Johnny Joint Adjustable Length Rear Trac Bar for TJ Wrangler and LJ Unlimiteds features our narrow body Johnny Joint rod ends at both ends. Johnny Joints provide maximum articulation in extreme off-road situations. The 1 1/4 in. x .250 in. wall 4130 chromoly bar incorporates precise bends in the interest of providing maximum clearance between large differentials and the bar itself.
This bar can be adjusted to work with stock rear differential trac bar brackets, aftermarket trac bar relocation brackets (such as our CE-9121N) or the trac bar brackets on aftermarket differentials.
Bar is fully greasable via zerk fittings. Finish is semi-gloss black powder coat on the bar and gold zinc plating on the Johnny Joint adjuster end.
If you are currently in the market for a Rear Trac Bar Relocation Bracket, see our CE-9123 kit that includes this Trac Bar and our CE-9121N Rear Trac Bar Relocation Bracket!

Kit Fits:

  • Jeep Wrangler TJ – All Models
  • Jeep Wrangler TJ Unlimited (LJ) – All Models

Kit Includes:

  • Johnny Joint Rear Trac Bar Assembly
  • (2) Rubber Washers (outboard of the Johnny Joint at the chassis end to encourage the bar to re-center itself after articulating)

Adjustment Range:

  • Closed – 31.062 in.
  • Extended – 31.810 in.

Fitment Specs.:

  • Intended to be used with 2 in. – 4 1/2 in. of lift


  • See RJ-510100-101 
  • Bar is fabricated from 1.25 in. x .250 in. wall 4130 chromoly tubing.
  • Adjuster features 1 in.-14 RH threads.
  • Johnny Joints require non-synthetic, hi-moly lube grease such as our CE-9013G 
  • Applicable Johnny Joint Tool for this Trac Bar: CE-9112T 

Parts List:

  • Complete Johnny Joint Adjuster End: CE-9112N-15 
  • Johnny Joint Rebuild Kit (differential end): CE-9112NRK 
  • Johnny Joint Pivot Ball (differential end): CE-91122-5 
  • Rubber Washer: CE-9120RW
  • Zerk Fitting (either end): CE-1103K21 


Fast and easy checkout with quick email response times.

Kevin M.

Was looking for something specific- gave them a call and was able to order it up, even though it was not on the website.

Ricardo D.

My new go to shop for all things offroad.

Dustin S.

Boyfriend and I both have a set of the 2.5’ whips for our jeeps and use them every chance we get. They look for show and work even better for light in camp and on the trails. They bolt up similar to a radio antenna and have a quick release feature that we have never seen before but absolutely love. Definitely top 5 favorite accessories we’ve bought for our jeeps, and customer service is just as great as their products!

Alexandra R.