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
8-Speed ZF Automatic -inc: stop/start (TSS), and single speed transfer box (high range only)
8-Speed ZF Automatic w/Paddle Shift -inc: stop/start (TSS), and twin speed transfer box (high/low range)