Turbo Models

The pressurized oil for the drive power distribution system (oil pressure and pilot pressure) enters the control valve body and flows through the passages in the transmission case to the extension case. The line pressure is regulated by the transfer control valve whose opening is controlled by the transfer pressure created by the transfer duty solenoid.

• The pilot pressure created by passing through the primary valve in the transmission's control valve body is further regulated into the transfer pressure by the transfer duty solenoid.
• The transfer duty solenoid is controlled by the TCM. The TCM changes the solenoid controlling duty ratio according to driving conditions.
• The transfer pressure thus created is applied to the transfer control valve and adjusts the valve's opening.
• The line pressure directly led to the transfer control valve, on the other hand, is regulated by the transfer control valve and becomes the transfer clutch pressure.
• The transfer clutch pressure is applied to the transfer clutch and engages the clutch to a controlled degree.

In this way, the degree of transfer clutch engagement is varied so that optimum torque is distributed to the rear wheels.