It's a motor with TONS of torque, meant for a heavier vehicle than a Slash 4x4. It's not going to coast like a 540 sized motor. How many lipo cells are you running with it? On 2S that motor will be a dog. It needs 3S (or even 4S) to wake up. If you are only running 2S it isn't really the best motor for your application. Something like the 3800 or 4600 4-pole 540 motors would work much better on 2S in that truck.