The 1180 ARFF Series transmission system consists of an engine mounted 17.5 or 18.5 inch type 8 torque converter, a 6 speed power-shift transmission and an advanced electronic control system. FEATURES AND ADVANTAGES Dry weight 1700 lbs (770 kg). Increased power and torque capacity to mate with modern 4-cycle high torque engines. Full time all wheel drive with differential lock. 30-70 and 50-50 biasing differentials available for 4x4, 6x6 and 8x8 vehicles. Optional part time AWD system available. High capacity PTO clutch with ability to shift on the fly at high speeds. State of the art TDEC-400 electronic control system.