Subaru impreza 2002 Service Manual page 57

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CENTER DIFFERENTIAL

Manual Transmission and Differential

C: FUNCTION

When there is no speed difference between the front and rear wheels, the center differential deliv-

ers the engine torque to the front and rear wheels at a ratio of 50:50.

When a rotating speed difference occurs between the front and rear wheels, the center differential

operates to absorb it in a controlled way by the function of the viscous coupling.

1. DURING NORMAL DRIVING

During straight-line driving on a flat road at a constant speed, all the four wheels rotate at the same

speed. The center differential delivers engine torque evenly to the front and rear drive axles. The

viscous coupling does not generate shear torque because there is no relative movements be-

tween the inner and outer plates.

NF0613

(1) Engine torque

(A) To front differential

(B) To rear differential

6MT-19

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