What kind of motor need in PMD reduction 4:1 ?

[Mustang46555]

I've ran the stock Tamiya kit motor with a PMD 4:1 in my Knight Hauler for over five years now. My 4:1 is the earlier separate unit rather than the new bolt on but the ratio is the same. It has plenty of power, pulled Rick's big drop deck all over Indy one year with Willy steering the rear of the trailer. Truck never broke a sweat, even when we went outside and cranked her up into 3rd gear with Lynn's quarry dumper as cargo! Driving with a normal trailer is nice and smooth. Very controllable in a crowded environment. I'd assemble it with the reduction unit and the stock motor first and see how you like it.