Your car's transmission, whether automatic or manual, needs
lubrication to reduce friction and disperse heat. For an
automatic, there are three types of transmission fluid: type F,
type H, and dextron two. The shifting characteristics can be
affected by the type of transmission fluid you use. The correct
type for your car can be found in the owner's manual or written
on the transmission fluid dipstick. To check the automatic
transmission fluid, make sure the engine is running and warmed
up. With the transmission in park, remove the dipstick and wipe
it off. Reinsert it, remove it and check the level. If it's low,
add fluid through the dipstick tube. Manual transmissions use a
variety of oils. American Petroleum Institute or API has
established oil ranges from GL-1 to GL-5. Using a higher grade
than necessary can harm transmission parts. Some manual
transmissions use automatic transmission fluid while still
others operate on engine oil. Make sure you're using the correct
transmission fluid for your car. ©2006