When changing the oil, pour approximately one-half quart of oil directly into the new filter before mounting. After the filter contacts the engine block tighten only one-half turn more by hand. Re-start the engine to circulate the new oil, then shut down and check the level. Put the used oil in a container for transport to a recycling center. Most service stations will accept this small amount of oil.
Most manufacturers recommend at least a seasonal transmission fluid change.
Using a suction pump, remove the old fluid through the filler opening or as specified by the manufacturer. Refill the transmission using the fluid or oil specified by the manufacturer. Run the engine to warm the transmission fluid to normal operating temperature and shut down the motor. Immediately check the fluid level as indicated by the manufacturer. Failure to check the level right away will result in inaccurate readings as the fluid expands when heated and runs back into the cooling lines as it cools.