Due to the problem we were having with Death Wobble, we did some experimentation with stiffer aftermarket track bar bushings, and found we were able to cure the Death Wobble on our test rig after they were installed. Armed with this knowledge, Kevin found a polyurethane molding company who was willing to build a mold and pour us the hardest track bar bushings that exist...at least 25% stiffer than the STIFFEST ones that we had the early success with...which will work in track bars built by Jeep/Mopar/Dodge, as well as MANY different aftermarket track bar manufacturers, so long as that bar has the "standard aftermarket track bar end-loop size", which measures 1-1/2" Inside Diameter and has a width of 1-3/16". Measure your bar to see if it will work...it fits many different aftermarket bars, as well as our Track Bar Conversion. This is perhaps the least expensive way to tighten up your steering system, removing slop, and perhaps even cure Death Wobble at the same time!
MAKE SURE TO PURCHASE THE KOR-1189-S KIT WITH SLEEVES INSTEAD, IF YOU ARE RETROFITTING OUR BUSHINGS INTO A TRACK BAR THAT PREVIOUSLY DIDN'T HAVE A 7/8" OD SLEEVE. THE KOR-1189-S KIT COMES WITH SLEEVES AND BOLTS.
The result has been superior. We have been able to cure our customer's Death Wobble in most all cases with our SuperDurometer bushings, a new Hard-KOR steering stabilizer, and a proper alignment.
If you could cure your Death Wobble problems for under $100, would you feel that was good investment? Many, MANY customers think so, and write to us to tell us so, and to thank us for creating such a product.
Make sure to order up the KOR-1109 Mineral-oil based lubricant at the same time. Polyurethane bushings do not last as long with petroleum-based lubricants!
**A note about retrofitting your ORGS, JKS, or other aftermarket track bar with our Super-Durometer bushings mentioned above: Many factory and aftermarket track bars come with rubber press-fit cartridge-style bushings installed, rather than the easily-replaceable method of using two poly bushing halves, inserted from each side of the end loop, and then sliding the included steel sleeve inside the bushings. If you have the rubber-cartridge style bushings, then you cannot use the Super-Durometer 72D bushings without first removing that rubber cartridge bushing completely from your bar. If you have one of these bars, then please order up KOR-1189-S kit INSTEAD, which includes the thick steel sleeves.
Note 2: On some factory track bars (such as the JK Wrangler), this kit is compatible with the UPPER bushings, but not the lower bushing. If your upper and lower track bar bushings do not match in size, either install our SuperDurometer bushings ONLY on the frame side, or upgrade to a nice beefy JKS track bar at the same time, so you can run the SuperDurometer bushings on the frame AND the axle side.
Note 3: While these bushings will fit and function in the factory track bar for WJ Grand Cherokees, they were specifically designed for a JKS end loop which is wider than the factory bar. When installed in the factory WJ bar, the bushings will protrude slightly from each side of the track bar end loop and can wear prematurely. Bushings installed in factory WJ track bars are not considered as covered under warranty for these reasons. We strongly recommend upgrading to the JKS bar on the WJ for many reasons.