Abstract: A drop box transmission suitable for drawbar pull vehicles or vehicles adapted to push obstacles or non-powered equipment and of a simplified construction. The transmission provides 8 different forward speeds and is easily adapted to provide either 4 or 8 reverse speeds. In one embodiment 8 forward speeds, 4 reverse speeds and full power shift capability is provided using of 14 gears, 5 shafts and 7 clutches. The reverse shaft is in constant mesh with the input shaft and includes at least one clutch controlled gear for driving the first intermediate shaft. Two clutched controlled gears are provided on the input shaft and are disengaged in the reverse mode. The output shaft having two clutch controlled gears is driven by a secondary intermediate shaft having at least 3 fixed gears thereon. In the case of only 3 gears on the secondary shaft one of the gears is in mesh with a clutch controlled gear on the first intermediate shaft and a clutch controlled gear on the output shaft.

Abstract: The specification of the present application discloses a geared hub for use in transmitting power to the wheels of a vehicle. The geared hub is particularly useful for all terrain type vehicles where high strength and reliability are required. The hub uses a one-piece cast housing having various access openings to allow assembly of the unit. The one-piece housing defines an elongated gear chamber which extends generally perpendicular to the wheel spindle. Three access ports are provided; one for supporting the wheel spindle, a second port for allowing the insertion of an input pinion and input shaft, and a third port for allowing insertion of the output gear. The first two ports are located in the end walls of the gear chamber with the third port located in the sidewall of the gear chamber. The unique design, according to the present invention, results in an inherently strong and durable hub having reduced manufacturing and assembly costs.