Adding transmission fluid to most vehicles is an easy process. It usually involves simply removing a dipstick, inserting a funnel and pouring in the the fluid. Adding transmission fluid to a Mercury Mountaineer is a bit different, however. A Mountaineer does not have a dipstick on the transmission; instead, it has a plug that releases fluid and also allows operators to add fluid. The plug is located on the side of the transmission and can be difficult to reach. Purchasing a fluid level tube and a small funnel from your local auto parts store can make the job much easier.
Locate the transmission of the Mountaineer. The drain plug is located on either the left or right side of the transmission.
Remove the plug by unscrewing it with your hand. Place a pan underneath the transmission so that any excess fluid that may leak out can be caught.
Place a fluid level tube into the hole and attach a small funnel to the end of the tube.
Pour the transmission fluid into the funnel until the compartment is full. A completely dry Mountaineer will generally take around five quarts of fluid.
Replace the plug and start the engine. Let the engine idle for about five minutes to allow the fluid to fully lubricate the transmission.
