A method is provided for controlling a drivetrain of a vehicle which includes a prime mover (12) operatively connected to at least one tractive element (23). The method included: (a) determining the vehicle's total weight, and (b) using an electronic controller (26) carried by the vehicle, causing the prime mover (12) to apply power to the tractive element (23) so a as to propel the vehicle, the magnitude of the power being a function of the vehicle's total weight.