POWER TRANSMITTING SYSTEM FOR A 4-WHEEL DRIVE VEHICLE

摘要

A power transmission system for a four-wheel drive vehicle having an automatic transmission has a differential operatively connected to an output member of the automatic transmission for providing the four-wheel drive vehicle. A hydraulic clutch is provided for locking the differential. A hydraulic control circuit is provided for applying oil at the line pressure of the automatic transmission to the clutch so as to engage it to lock the central differential.