In a vehicle drive transmission device, a transmission includes an intermesh first engagement device, a frictional second engagement device, a first drive device configured to drive the first engagement device, and a second drive device configured to drive the second engagement device. The first drive device includes a first shift drum, a first cam mechanism configured to convert rotational motion of the first shift drum into linear motion, and a first transmission mechanism configured to perform the linear motion. The second drive device includes a second shift drum, a second cam mechanism configured to convert rotational motion of the second shift drum into linear motion, and a second transmission mechanism configured to perform the linear motion. The first shift drum and the second shift drum are connected so as to rotate integrally with each other via a drive shaft. A drum drive source is provided to drive the drive shaft.

A friction clutch for releasable transmission of a torque between a first drive unit and a second drive unit includes a rotational axis, a friction package for transmitting the torque in a pressed state, a first actuating element, and a second actuating element. The friction package has at least one friction plate and at least one friction disk. The first actuating element is arranged on a first side of the friction package for pressing the friction package in a first axial actuating direction to achieve the pressed state, and the second actuating element is arranged on a second side of the friction package, opposite the first side, for pressing the friction package in a second axial actuating direction, opposite the first axial actuating direction, to achieve the pressed state.

During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.

During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.

A kit for modifying an OE vehicle transmission includes a replacement forward piston housing, forward clutch hub and a forward clutch and a replacement direct piston housing, direct clutch hub and a direct clutch. A drum extends between and operably connects the replacement forward piston housing and direct piston housing. The kit includes a replacement sprag shaft. The forward clutch hub and forward clutch and the direct clutch hub and direct clutch are positioned between the forward piston housing and the direct piston housing. At least a portion of the forward clutch and at least a portion of the direct clutch are operably mounted to the drum. The forward piston housing and direct piston housing do not counter rotate relative to one another. A power flow module for an OE vehicle automatic transmission is disclosed.

A kit for modifying an OE vehicle transmission includes a replacement forward piston housing, forward clutch hub and a forward clutch and a replacement direct piston housing, direct clutch hub and a direct clutch. A drum extends between and operably connects the replacement forward piston housing and direct piston housing. The kit includes a replacement sprag shaft. The forward clutch hub and forward clutch and the direct clutch hub and direct clutch are positioned between the forward piston housing and the direct piston housing. At least a portion of the forward clutch and at least a portion of the direct clutch are operably mounted to the drum. The forward piston housing and direct piston housing do not counter rotate relative to one another. A power flow module for an OE vehicle automatic transmission is disclosed.

A vehicle drive device that includes an input member drivingly coupled to an internal combustion engine; an output member drivingly coupled to wheels; a first rotating electric machine; a second rotating electric machine drivingly coupled to the output member; a differential gear device having three rotating elements, namely a first rotating element, a second rotating element, and a third rotating element, in order of rotational speed; and a friction engagement first clutch that is located in a power transmission path connecting the input member to the differential gear device and that allows the input member and the differential gear device to be decoupled from each other.

During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.

During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.

A power flow module for a vehicle automatic transmission. The power flow module includes a direct piston housing, a direct clutch hub, and a direct clutch. A sprag shaft is splined to the direct clutch hub. A bushing support is positioned between the direct piston housing and the sprag shaft to provide at least one of alignment, rigidity, and support thereto.