Abstract: A multiple disk clutch includes a clutch drum having an interior surface with a plurality of spline grooves, a servo piston, a clutch plate with splines engaged within the spline grooves, and a cushion plate, with splines engaged within the spline grooves, arranged between the clutch plate and the servo piston. The splines of the clutch plate and those of the cushion plate are engaged within different spline grooves so that the splines of the clutch plates and those of the cushion plate do not contact each other when the clutch is engaged by a load imposed by operation of the piston.

Abstract: A stator shaft is press-fitted and secured to the inner peripheral surface of a pump cover positioned between a torque converter and a automatic transmission mechanism section. Bushings are fitted to a part opposing the press-fit section with reference to the outer peripheral surface of an input shaft fabricated with a uniform diameter with the exception of the rear end part, and to a part slightly forward of the above-mentioned part, respectively, and an oil channel for the torque converter feed pressure is formed between the two bushings. As a result, the forward end section of the input shaft is supported in a freely rotatable manner by the bushings which are relatively close to each other. The torque converter feed pressure is fed from an oil channel formed in the pump cover to an oil channel between the two bushings, and through the cross hole and the center hole formed in the input shaft to the torque converter.