A transmission fluid exchange is more than just a real service: It’s a worthwhile addition to your regular maintenance routine — here’s why. During the more familiar transmission service, the technician removes the pan and replaces the filter. Then they reinstall the pan and refill the transmission.
That type of service is valuable and worthwhile, but it only replaces part of the transmission fluid. In some cases, less than half of the fluid is replaced. The rest of the old, worn-out fluid remains in the transmission. That’s important because transmission fluid does more than just lubricate the transmission parts. It also cools the transmission and even provides the connection between the engine and the wheels.