The motor shakes alot because I dont have the tranny side torque mount in and the one the mounts on the A/C compressor bracket is borken. I have hasport mounts sitting in my room but have been bust/ lazy. I really dont have any probelms with the motor as far as I can tell absolutely no problems at cruising no problems at mid to high rpms either. Then again I dont really have anything to compare it too. Other than the old CTR that was in there which the difference is like night and day since I actually have a little torque.