Update...As I stated, this JKUR had severe death wobble. Since it was still under warranty I took it in to the dealer. I left it with them and told them to drive it home a time or two so they could get a first hand sample of the wobble.
They started off by diagnosing an oil leak around the sector shaft on the steering gearbox. They ordered and installed a new gearbox. Jeep still wobbled. They installed a new drag link, Jeep still wobbled. I had tested the ball joints, the passenger side lower had about 1/8th inch up and down movement. They installed new ball joints, warranty on the passenger side, I paid for the drivers side. It had very little movement, I did not want to leave anything to chance.
The tires had been rotated and balanced twice, they have less than 6000 miles since new. The Jeep had been aligned--twice-everything was within specs. Still wobbled. The dealer stated that the tie rods needed to be changed out, everything else had already been changed so that had to be the culprit.
By this time I had gotten the MetalCloak HD steering system. I had wanted the wobble to be fixed before I put it on, didn't want it to be said that the non-stock parts were the cause of the problem. Anyway, I took the Jeep home and my son-in-law helped me install the system. Test drove it, all was good. Took it for a longer test drive the next day over a section of pavement that always started the wobble--all was good.
Took it on a 2 day trip, freeway, rough pavement and a little dirt--all was good. So, did the MC system cure it....The definitive answer is....maybe. When we put the system on I decided I was not going to pay for another alignment. All they can do is set the toe-in and center the steering wheel. The caster angle was good. Miraculously, we set the drag link to the right length the first time and the steering wheel was centered. We set the toe so that, with a tape measure, the front of the steering tires was approx 3/4" of an inch narrower than the back of them. This should equate to about 3/8" toe-in.
Measuring tape alignments are not the most accurate way to do it, but in this case it worked. 3/8th of an inch is a bit on the high side for toe-in, but I am not going to argue with success. I may reassess if the tires start to show abnormal wear. I am left wondering though, if I had set that amount of toe-in prior to everything else, would it have solved the problem? At no time during this ordeal was there any sign of looseness in any tie rod ends. We did the back and forth movement while feeling the joints for looseness, everything seemed tight.
The track bar was tight , the mounting holes are not wallered out, the only looseness of any kind was the passenger lower ball joint and that proved to not be the cause of the problem. We leave for Silverton the end of this month, about a 1400 mile round trip on pavement with a lot of wheeling while we are there, the damn thing better be fixed!!!