You put the selector into the appropriate range and begin to
move forward. Suddenly, you feel the engine racing and the transmission
lagging behind. We see this symptom quite often but what is difficult to
determine is what is causing the transmission to slip. Transmissions
slip for a variety of reasons including low fluid level, poor vacuum or
a misadjusted or defective shift cable. When you are faced with this
type of symptom, it's best to have it checked out by the professionals
at Montgomery BCC Transmissions