Before beginning work, purchase the specified transmission fluid and a new filter, along with necessary tools such as a floor jack, jackstands to support the vehicle, a drain pan capable of holding at least 5 quarts, newspapers, and clean rags. Raise the vehicle and support it securely on jackstands, ensuring it is level. Place the drain pan underneath the transmission pan, remove the front and side pan mounting bolts, and loosen the rear pan bolts approximately four turns. If the vehicle has a drain plug, drain the fluid from it before loosening any pan bolts. Carefully pry the transmission pan loose with a screwdriver to allow the fluid to drain, then remove the remaining bolts, pan, and gasket, cleaning the gasket surface of the transmission to remove all traces of the old gasket and sealant. Drain the fluid from the transmission pan, clean it with solvent, and dry it. Pull the filter straight down from the transmission without bending or twisting the filter tube neck, and if the seal(s) did not come out with the filter, carefully remove it from the transmission. Install a new filter and seal(s), ensuring the gasket surface on the transmission pan is clean before fitting a new gasket on the pan. Put the pan in place against the transmission and tighten each bolt a little at a time until the final torque is reached, keeping in mind that the correct torque to avoid leaks is quite low. Add new fluid to the transmission, checking the specifications for the proper quantity, and using a syringe or hand pump, fill the transmission until it is level with the bottom of the filler plug hole before starting the engine. With the transmission in Park and the parking brake set, run the engine at a fast idle without racing it, then move the gear selector through each range and back to Park, checking the fluid level, which will probably be low. Check under the vehicle for leaks during the first few trips, and remember that the old fluid drained from the transmission cannot be reused and should be disposed of properly. Check with local auto parts stores, disposal facilities, or environmental agencies for recycling options, and after the fluid has cooled, drain it into a container for transport to a disposal site, avoiding pouring it on the ground or down a drain.
Posted by GMPartsGiant Specialist