[shall36]

Trans coolers are standard on '00 t0 '02 Tundras. From '03 up, they are installed when the truck is equipped with the TO-Tow Package.

All V-8 trucks have an oil cooler, which uses engine coolant to cool the oil using a sandwich adapter at the oil filter.

See http://www.tundrasolutions.com/forums/engine-and-drivetrain/66360-transmission-cooler-installation-how-to-guide/