5-speed automatic transmission w/OD & tow/haul mode
Instrumentation-inc: coolant temp gauge, oil pressure, transmission oil temp gauge, tachometer, volts
6-speed automatic transmission w/tow/haul mode
Brake/transmission shift interlock
6-speed automatic transmission w/OD & tow/haul mode
HD air-to-oil aux transmission oil cooler
HD 6-speed automatic transmission w/tow/haul mode