2017 JKUR, 13,000 miles. Has lived in Texas and Arizona it's whole life. No salt. just completed install of Clayton 3.5" lift and Dynatrac PR44 (after bending the stock Dana 44 on a rain rut that was a hell of a lot nastier than it looked). After getting it all back together I drove it for about a week on my 35's without a steering stabilizer and it was fine. I did the alignment myself with an angle finder and tape measure. 80mph down the interstate was no different than my wife's volvo. I was pretty proud of my alignment job. Installed ProGrip brakes earlier this week, braking was awesome. Took the Jeep down to discount to trade in my 35's for some 37's, hopped on the interstate and was absolutely happy with how the Jeep rode with 37s. Patted myself on the back a little for a job well done. Then at some point I noticed a pull to the right. At first I thought I had the right tire toe'd out somehow. Made an adjustment and took the jeep for a drive and hit a bump and got DEATH WOBBLE at about 20mph. Full stop. I went through every bolt/nut - checked torque and re-measured checked angles. All good. Went back out and drove to a rough section of chipseal road and got death wobble to the point where I nearly lost control of the Jeep. Got back to the house and jacked the jeep up and realized the front brakes were dragging, bad. I think the death wobble was caused by a dragging brake being turned into a singular engaged brake by a bump....somehow.....
So far I have disassembled brakes and made sure caliper was floating on slide pins, re assembled, no change. Disassembled brakes and thought the forging on the dynatrac bracket was conflicting with the piston and not allowing the caliper to float far enough. Ground off a little of the bracket to clear the piston. No change. Took the entire progrip kit off the Jeep and returned everything to OEM. No change. Bled brakes. No change. Re-installed Pro-Grip very carefully...because I was running out of options. No change. The brakes are bound so hard that with the tire off its almost impossible to turn the rotor. With the tire on, a solid "spin" of the tire gets you less than a revolution. I've seen a number of threads about pistons seizing, I don't think that's my issue given age, mileage and environment. The piston pushes back in with normal resistance. Open to any ideas. I've done a lot of brake jobs and I've run out of ideas on diagnosing this. I can swap in new calipers for shits and giggles but I'd rather not light my money on fire.
So far I have disassembled brakes and made sure caliper was floating on slide pins, re assembled, no change. Disassembled brakes and thought the forging on the dynatrac bracket was conflicting with the piston and not allowing the caliper to float far enough. Ground off a little of the bracket to clear the piston. No change. Took the entire progrip kit off the Jeep and returned everything to OEM. No change. Bled brakes. No change. Re-installed Pro-Grip very carefully...because I was running out of options. No change. The brakes are bound so hard that with the tire off its almost impossible to turn the rotor. With the tire on, a solid "spin" of the tire gets you less than a revolution. I've seen a number of threads about pistons seizing, I don't think that's my issue given age, mileage and environment. The piston pushes back in with normal resistance. Open to any ideas. I've done a lot of brake jobs and I've run out of ideas on diagnosing this. I can swap in new calipers for shits and giggles but I'd rather not light my money on fire.