So a few weeks ago I’m driving at about 110-120km/hr and my jeep literally sounded like a helicopter propeller. I thought I had one over my head, but I also felt the jeep shaking. Never happened before. I take it in to get checked out and they said they didn’t find anything wrong. Mechanic said something about maybe the caliper overheating or something. Not even sure what that is. Car seemed fine at high speeds after that until today. Same thing happens again. Not sure what to do at this point.

 

Check some of the simple things: Lugs are all torqued (no loose ones) You didn't loose a balance weight?
What size tires have you on the Jeep?