The WABCO model 3200 3 axle, 200 ton mining truck was announced in the fall of 1971. It employs a 2000 HP electro-mechanical drive system to power tandem rear axles. The power train consists of an EMD 12-645-E4 900 RPM locomotive type engine, generator, controls and two (2) drive motors. Each tandem axle has one (1) motor, which drives the wheels through a reduction gear set, a differential and planetaries. This paper describes the features of the drive system and its unique contributions to vehicle design and performance.