Today’s Cummins Engines produce an amazing amount of torque. When focusing on the Model 2000 and the Trail Boss, both models offer the Cummins 6.7 with Stage 5 emissions. The Model 2000’s 210 HP engine produces 625 ft-lb of torque and the Trail Boss 326 HP engine has an impressive 1100 ft-lb of torque! This amount creates a tremendous strain on the running gear. The Model 2000 can be upgraded to the massive Spicer 21060-D. This differential model number is indicated as (G) differential. The large Spicer G is standard equipment for the Trail Boss.