Transmission Flush
A transmission flush is a maintenance process where all of the oil in a transmission is removed, new oil (and sometimes cleaning solutions) is run through it using a special machine to push out grime and sludge and then it is filled up with new oil.
Some issues you can experience if you are having transmission problems is trouble shifting, the transmission seems to be slipping, transmission fluid is leaking, vehicle is inoperative, there is noise in the transmission, and a check engine light comes on.