Abstract: A fluid coupling control device of an automatic transmission includes a turbine chamber into which an operation fluid flows, an operation chamber which is separated from the turbine chamber and into which the operation fluid flows, a clutch mechanism which engages and disengages the input member with the output member, a piston member slid by a fluid pressure difference between the operation chamber and the turbine chamber so as to engage and disengage the clutch mechanism, a fluid source which supplies the fluid to the operation chamber and the turbine chamber, and a control device disposed between the fluid source and the operation chamber which controls the fluid pressure in the operation chamber based on the fluid pressure in the turbine chamber.

Abstract: An automatic transmission system provided with a power take-off unit, which is composed of a torque converter equipped with a lock-up clutch and a control unit that serves to set the lock-up clutch ON/OFF. With the power take-off unit in operation, the control unit sets the lock-up clutch ON only when an engine output is determined to be higher than a predetermined level, and a shift lever is set in either neutral or parking position.

Abstract: A hydraulic control apparatus for an automatic transmission having a mechanical parking mechanism includes a manual valve disposed in the hydraulic control apparatus and having a parking (P) position, reverse (R) position, neutral (N) position and at least one forward speed position. The manual valve is provided with a drain port for releasing, in the parking position, the hydraulic pressure of a hydraulic circuit which establishes the reverse range, and the drain port is provided with an orifice which limits the discharge rate of hydraulic pressure.

Abstract: An automatic transmission includes a parking gear spline connected with an output shaft of the transmission, a plurality of governor valves mounted on the rear side of the parking gear and radially disposed around the output shaft axis, a speed meter drive gear which is spline-connected with the output shaft at the rear of the governor valves, and an annular spacer fitted on the output shaft between the governor valves and the speed meter drive gear.

Abstract: A parking device for an automatic transmission system in automotive vehicles includes a parking gear connected to the engine output shaft, a pawl having one end pivotally mounted to the transmission housing and the other end pivotable towards and away from the parking gear, and a parking cam operatively associated with the pawl and movable axially of the gear for bringing the pawl into and out of engagement with the parking gear. A cam guide and a reaction supporting bracket are retained by a plurality of bolts and by at least one boss having a flat surface and affixed to the transmission housing so as to be situated on the side of the pawl opposite the parking cam.

Abstract: A sealing device disposed between flanges of a joint assembly comprises a sealing member having an endless shape and an end cover with its periphery held between the flanges and adapted to hold the sealing member inside of the periphery in association with the flange of a casing. The end cover has, along its periphery, first support portions spaced in equal interval and second support portions located between the adjacent first support portions. The second support portions are formed by folding back parts of the end cover and have bolt holes. The end cover further has a setting portion for the sealing member, inside of the periphery. The setting portion is recessed for a depth corresponding to the thickness of the end cover from the faces of the first and second support portions which are in contact with the flange of the casing.

Abstract: A speed change gear system of the type including an input shaft, an output shaft, three planetary gear sets each having a central sun gear, an ring gear, a set of planetary pinion gears meshingly connecting the sun gear with ring gear and a revolving carrier rotatably supporting the pinion gear, two clutches, and three brakes.