Glossary

2 wheel drive - a motor vehicle transmission system delivering power to only the front or rear wheels

4 wheel drive - An automotive drive system in which mechanical power is transmitted from the drive shaft to all four wheels.

Traction - the friction between a body and the surface on which it moves (as between an automobile tire and the road)

Transfer Case - The transfer case receives power from the transmission and sends it to both the front and rear axles

Transmission - a gear system that transmits mechanical power from an engine to some form of useful output device

Differential - a device consisting of gears, for supplying equal tourque to the driving wheels, even as they rotate at different speeds.

Limited-Slip Differential - limits the velocity difference between a pair of driven wheels so that useful torque can be transmitted as long as there is some friction available on at least one of the wheels.

Posi Track - differential turns both drive wheels at same rate weather traction is lost or not

All Wheel Drive - a drivetrain that allows all four wheels to receive power from the engine simultaneously

Hub - the part of the wheel that locks the axles in so the wheels will then become drive wheels