Differential - Positive Traction: Description

NOTE: Positive traction type differentials for Ford Motor Co. vehicles will be referred to as a Traction-Lok differential.

Traction-Lok is a limited slip type differential that directs major driving force to wheel with greatest amount of traction. This is accomplished by a spring-loaded multiple disc clutch pack behind each side gear. Each clutch pack uses friction surfaced clutch discs splined to the side gear and steel clutch plates held by the differential case.

Traction-Lok differential uses 2 sets of multiple disc clutches to control differential action. The side gear mounting distance is controlled by 7 plates (3 steel, 4 friction) and one steel shim of select size to control side gear position.

In operation, preload spring pressure is accompanied by side gear thrust load to compress clutch packs, providing resistance to normal differential action. Preload spring pressure is calibrated to allow some slippage of clutch packs under variable torque conditions such as turning corners.

A Traction-Lok differential assembly can be installed within either 7.5" or 8.8" diameter ring gear. Except for the differential case and its internal components, the Traction-Lok axle shaft is identical to the conventional axle shaft.

CAUTION: Use of unequal size tires on rear axle for extended mileage will result in accelerated wear of Traction-Lok limited slip unit.