Front wheel hop when braking - suspension arm bushes, or... ?? Any help?

[C. Lee]

I replaced brake pads and rotors on my 21 RTL with 25k miles last year and I seem to remember a slight wheel "hop" or vibration under heavy braking. I didn't make any other adjustments and the issue seems gone this year. Not sure what caused it or what corrected it. The wheel never hopped enough for the rubber to leave the pavement and you couldn't feel it in performance. I could only see it happening. Not any advice on the fix, but letting you know you're not crazy. Chris

 

[SpyderJerry]

I am going to post about my 2014 RT SE6 that I purchased 2 years ago with the same problem. When I would apply brakes at moderate to high speed, the Front right wheel would hop and shake the fender like crazy. I did as suggested in the group to replace the A arm bushings. No difference. So I determined it had warped rotors. Bought a set of EBC rotors and pads. Rode about 2,000 to 3,000 miles and it started doing it again. So I dial indicated the rotor, indexed it on the hub, and found that the hub had a few thousands of run out. Replacing the hub did not cure the problem. Then I checked the rotor with a micrometer and found it was unparallel by 4 thousands and had up to 6 thousands of runout. Contacted EBC and they sent me 2 new rotors and pads. Another 2 to 3 thousand miles and it started shaking again. Same problem after a few thousand miles. Finished last season that way. Did more research and determined that calipers were possibly sticking. That's when I located the caliper kits and rebuilt them. No pistons were sticking. Finally, over winter I purchased OEM rotors and pads. This season, the Brakes now work flawlessly, so far...