Park on a level surface and let the transmission cool
Gather the correct transmission fluid, drain pan, funnel, jack stands, wrench set, and gloves
Check the owner’s manual for the correct fluid type and service procedure
Raise and secure the vehicle if needed
Locate the transmission pan or drain plug
Place the drain pan under the transmission
Remove the drain plug or loosen the pan bolts to drain the fluid
Remove the pan completely if required
Clean the pan and magnet
Replace the transmission filter if applicable
Install a new pan gasket if needed
Reinstall the pan and tighten bolts to the specified torque
Lower the vehicle if it was raised
Add the new transmission fluid through the dipstick tube or fill port
Add fluid slowly and check the level frequently
Start the engine and shift through all gears
Recheck the fluid level with the engine running and top off as needed
Inspect for leaks
Dispose of the old fluid properly