Originally Posted by
eper
i'd start by recalibrating the esc to the transmitter. Then remove the pinion and see if the drivetrain is free. Then id try running the motor with no pinion and see if its breaking hard without the drive train. just go one possibility at a time. did it work fine with the stock radio?
I pulled the pinion and checked the drive line, was smooth as butter so I reset the mesh and that solved the issue.
Can't believe I missed that, thank you for the help!