Taking technology into its own hands, Cumberland International, in Cumberland, Tennessee, has created its very own mpg-optimized truck model with fleet customers in mind.
Hill Climbing's Easy for mDrive and 'Downsped' MP8 Diesel
The Pinnacle-pulled rig weighed close to 80,000 pounds. So how did it pull the hills at such low engine speeds? With 1,860 lb-ft of torque, and with no more speed loss than one would find with higher revving engines.