Transmission, 6-speed, electric automatic -inc: overdrive and tow/haul mode, driver shift control, manual shift mode
Cooler, auxiliary, external transmission oil cooler, heavy duty air-to-oil
Transmission, 4-speed automatic, electronic variable automatic
6-speed electronically controlled automatic transmission w/OD -inc: sequential-shift mode, transmission cooler, auto transmission fluid warmer, lock-up torque converter