Abstract: A vehicle transmission particularly suitable for an agricultural tractor provides a large number of drive ranges by combining manual selection of any of several speed ranges while the vehicle is stopped with power shifting being available while the vehicle is in motion. The arrangement of the transmission allows the input shaft to be located at the top of the housing, with a plurality of shafts carrying the shift assemblies located immediately below the input shaft. The output shaft is positioned in the lower portion of the housing providing output torque at both ends of the housing, thereby eliminating the need for a transfer case normally required in interconnecting a transmission to both the front and rear wheels of the vehicle.

Abstract: A vehicle service and parking brake of the multiple oil disc configuration is included in the transmission housing of the vehicle. A plurality of interleaved braking discs arranged circumferentially about the output shaft of the transmission with one disc associated with the output shaft while the next adjacent disc is associated with the transmission housing forms the braking element. Brake applicator, movable in a first direction to cause the interleaved braking discs to come together in braking relation one with another and movable in a second direction to allow the braking discs to separate, is urged in the first direction by resilient means. The brakes are released by pneumatic means urging the brake applicator in the second opposite direction. Pneumatic service brake actuator is provided and is selectively operable to act in cooperation with the resilient means to urge the brake applicator in the first direction to apply the vehicle service brakes.