Friction Plate

Friction plates for automatic transmissions come in a variety of materials and sizes.

The thickness of the friction material and the groove pattern on the plate also help to provide the desired friction properties.

Automatic transmission clutches can be categorized as shifting or holding.

Shifting applications require dynamic coefficients of friction that are high and uniform to provide superior timing and smoothness.

In holding applications, high static coefficients of friction are necessary to meet engine stall requirements.