Patent ID: 7377342

Claim:
A transmission of a four-wheel drive vehicle having a swing arm for supporting rear wheels of the vehicle, the swing arm being supported on a vehicle body so as to be able to swing in an up and down direction, the transmission comprising: a transmission case having a power takeoff shaft case; an input shaft housed in the transmission case; a counter shaft housed in the transmission case, in which the counter shaft is in parallel with the input shaft and is connected with the input shaft through a gear mechanism; a transmission output shaft housed in the transmission case, in which the transmission output shaft is in parallel with the counter shaft and is connected with the counter shaft through a gear mechanism; a power takeoff shaft for driving front wheels of the vehicle, in which the power takeoff shaft is housed in the power takeoff shaft case and is connected with the transmission output shaft through a bevel gear mechanism, and in which the power takeoff shaft extends in a direction substantially perpendicular to the transmission output shaft; a rear reduction gear mechanism housed in the transmission case, in which the rear reduction gear mechanism is connected with the transmission output shaft through a gear mechanism; and a rear axle shaft for driving the rear wheels, in which the rear axle shaft is housed in the transmission case and is supported on the transmission case at one end thereof, and in which the rear axle shaft is connected to the rear reduction gear mechanism, wherein the transmission is mounted on the swing arm of the vehicle.