Final Drive Ratio, Glossary and Terms, Automotive, Motorcycle, Boat Dealers
List of United States Automotive, Motorcycle, Boat, Dealers, Service Stations
"Final Drive Ratio"
A fluid coupling consists of two fan-like impellers in a sealed, oil-filled housing. The input "fan" churns the oil, and the churning oil, in turn, twirls the output "fan." Such a coupling allows some speed difference between its input and output shafts. The automatic transmission's torque converter is based on the fluid coupling principle.