Motor: The original motor was the 4HP motor made by General Electric, and can be used with the 'D1' (Rev-1) or 'D2' (Rev-2) motor controller. It was prone to overheating, and Ford replaced many (under the 3 year Bumper-to-Bumper warranty), with a 6HP motor made by Advance DC Motors. The 6HP motor MUST have the 'D2' (Rev-2) controller.
I have new 5.5HP and 7.7HP motors made by D & D. Both of these motors REQUIRE the 'D2' (Rev-2) motor controller.
Note: Your 'D2' (Rev-2) motor controller will need to be reprogrammed if you are replacing a 4HP motor. Contact us for more details.