The Paccar TX-12 PRO automated transmission for Class 6-7 and light Class 8 vocational applications builds upon the existing PACCAR TX-12 transmission, and is designed to operate at up to 445 hp, 1,700 lb.-ft. of torque, and 70,000 pounds GCVW. The transmission features PACCAR’s Extreme Duty clutch for improved low-speed maneuvering, Rock Free mode to help trucks get unstruck in mud or sand, an off-highway calibration tuned for changing soil conditions, a 12-speed gear set for wide ratio coverage, and an internal oil temperature sensor. Oil maintenance intervals are 250,000 miles, and the clutch is maintenance-free.