we were just bashing around my 7 year old was playing with he lockers while on the go with a 3s battery in there and the rear locker servo started going crazy. replacing it was a bit of a pain in the butt. they really bury that wire behind all the other wires. But hey buy it break it fix it right? the hardest part was getting the servo lined up with the locker so it operates the way it should.

I know one guy here had a problem with the high low range micro servo. I wish Traxxas used metal gears in the micros as well. I heard the plastic gears grinding away when the servo went bad. there was little warning.