RockJock's Johnny Joint Adjustable Length Front Trac Bar for the TJ, LJ, XJ, MJ and ZJ vehicles features a narrow body Johnny Joint rod end at the chassis end and a forged chromoly narrow Johnny Joint at the differential. Johnny Joints provide maximum articulation in extreme off-road situations. The 1 1/4 in. x .250 in. wall 4130 chromoly bar is offset at the chassis end Johnny Joint and incorporates precise bends in the interest of pushing the bar as far forward as possible to provide maximum clearance between large differentials and the bar itself.
Drilling is required to accommodate the supplied 5/8 in. frame hardware and 1/2 in. differential. Additional features include zerk fittings at both ends for greasing, gusseting of the Johnny Joint to the bar at the chassis end and a heavy duty flag nut at the differential end.
See notes for fitment parameters with regards to lift amounts!
Finish is semi-gloss black powder coat on the bar and gold zinc plating on the Johnny Joint adjuster end.

Kit Fits:

  • TJ Wrangler – All Models
  • TJ Wrangler Unlimited (LJ) – All Models
  • XJ Cherokee – All Models
  • MJ Comanche – All Models
  • ZJ Grand Cherokee – All Models

Kit Includes:

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

Adjustment Range:

  • Closed – 31.562 in.
  • Extended – 33.500 in.

Fitment Notes:

  • Intended to be used with a minimum of 2 in. of lift
  • Under 2 in. lift with Dana 30 frontends – may work but minimal testing has been done
  • Under 2 in. lift with Dana 44 and 60 or 9 in. Ford style frontends – clearance issues are likely
  • Always test fit before drilling!


  • Drilling is required to accommodate the new, heavier duty hardware at the chassis and differential ends of this Trac Bar.
  • 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 (differential end): CE-9112T 
  • Applicable Johnny Joint Tool (chassis end): CE-9110T 

Parts List:

  • Complete Johnny Joint Adjuster End: RJ-305301-102
  • Johnny Joint Rebuild Kit (differential end): CE-9112NRK  
  • Johnny Joint Rebuild Kit (chassis end): CE-9110NRK  
  • Johnny Joint Pivot Ball (differential end): CE-91122-6 
  • Johnny Joint Pivot Ball (chassis end): CE-91102TB1 
  • 5/8 in. x 5 in. Long Hex Bolt: CE-91257A833 
  • 5/8 in. Machined Washer: CE-9120W 
  • 5/8 in. Stover Nut: CE-H0032 
  • 1/2 in.-20 x 2 3/4 in. Long Hex Bolt: CE-91257A744  
  • 1/2 in. Flat Washer: CE-H0014 
  • 1/2 in.-20 Flag Nut: CE-9120NP  
  • 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.