Abstract: Leakage of gallery oil delivered to iron sleeves or the like cast into an aluminum tappet carrier through the opening of interfaces between the sleeves and the aluminum body is minimized by forming feed passages from the gallery wholly in aluminum material extending through larger openings in the sleeves so as to deliver the oil directly to the tappet bores without intersecting the aluminum-iron interface.

Abstract: A transmission control for an automatic shifting multiratio transmission having a torque converter clutch including a solenoid-operated valve. The solenoid-operated valve controls the operating condition of the torque converter clutch in response to an electronic control which is conditioned by a number of operating parameters and also including at least one pressure-operated electric switch. The one pressure-operated electric switch is responsive to the fluid pressure level in one of the friction devices for controlling one transmission ratio. Whenever the pressure-operated electric switch is actuated or deactuated, the torque converter clutch is momentarily disengaged to provide a smoother ratio change in the transmission.