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The RockJock front axle housing Johnny Joint kit replaces upper control arm bushings with Johnny Joint rod ends for TJ Wrangler, LJ Unlimited, XJ Cherokee, MJ Comanche and ZJ Grand Cherokee vehicles to improve articulation. The kit includes a Johnny Joint insert, installation tool and a thick flame‑cut upright with the joint preinstalled. Installation requires cutting and welding to mount the new uprights and is intended for use on factory Dana 30 or 44 differentials.
RockJock TJ/LJ/XJ/MJ Johnny Joint Kit Front End Housing 30 or 44 w/ Greasable 1/2in Thru Bolts
