18. After slipping the dipstick tube back in the pan, the exhaust was tidied up and everything received a once-over to ensure it was prepared to release tire-shredding power. We started the engine and let everything get warmed up. With our foot firmly on the brake pedal, we went through the Forward and Reverse gears several times to get fluid flowing throughout the entire assembly. With the truck running, we topped off the fluid and went out for one heck of a test drive.