Fluid & Filter Change
Under normal service (moderate highway driving excluding excessive hot or cold conditions), the manufacturer feels that automatic transmission fluid should not need periodic changing. However, if a major service is performed to the transmission, if transmission fluid becomes burnt or discolored through severe usage or if the vehicle is subjected to constant stop-and-go driving in hot weather, trailer towing, long periods of highway use at high speeds, fluid should be changed to prevent transmission damage. A preventive maintenance change is therefore recommended for most vehicles at least every 90,000 miles (145,000 km).
Although not a required service, transmission fluid changing can help assure a trouble-free transmission. Likewise, changing the transmission filter at this time is also added insurance.
The torque converters on some transmissions are equipped with drain plugs. Because it may take some time to drain the fluid from the converter, you may wish to follow that procedure at this time, then come back to the pan and filter removal.
Raise the car and support it securely on jackstands.
Before removing the transmission fluid pan, insure that the area is clean of dirt and debris
2. Place a large drain pan under the transmission.
Loosen all of the pan attaching bolts to within a few turns of complete removal
Loosen all of the pan attaching bolts to within a few turns of complete removal, then carefully break the gasket seal allowing most of the fluid to drain over the edge of the pan.
DO NOT force the pan while breaking the gasket seal. DO NOT allow the pan flange to become bent or otherwise damaged.
Once the pan is removed, discard the old gasket and insure that the mating surfaces are clean
When fluid has drained to the level of the pan flange, remove the pan bolts and carefully lower the pan doing your best to drain the rest of the fluid into the drain pan.
Inspect this magnet inside of the pan for any large pieces of debris. A light gray coating is normal
Clean the pan thoroughly with a safe solvent and allow it to air dry
5. Clean the transmission oil pan thoroughly using a safe solvent, then allow it to air dry. DO NOT use a cloth to dry the pan which might leave behind bits of lint. Discard the old pan gasket.
The transmission filter is secured by a mounting bolt (arrow). Some models may use two bolts
Remove the filter mounting bolt ...
... then pull the filter free from the transmission
6. If necessary, remove the Automatic Transmission Fluid (ATF) filter mounting bolts, then remove the filter by pulling it down and off of the valve body. Make sure any gaskets or seals are removed with the old filter. The transmission usually has one round seal and a rectangular gasket.
7. Install the new oil filter screen making sure all gaskets or seals are in place, then secure using the retaining screws, if applicable.
Install a new pan gasket
8. Place a new gasket on the fluid pan, then install the pan to the transmission. Tighten the attaching bolts to 71-119 inch lbs. (8-13 Nm).
Fill the transmission with the proper amount of ATF
9. Add three quarts (six quarts if the torque converter was drained) of fluid to the transmission through the filler tube.
10. Remove the jackstands and carefully lower the vehicle.
11. Start the engine and move the gear selector through all gears in the shift pattern. Allow the engine to reach normal operating temperature.
12. Check the transmission fluid level. Add fluid, as necessary, to obtain the correct level.