Abstract: In a vehicle transmission comprising a hydrostatic transmission (13) and a rear-wheel drive assembly (20) including a two-stage speed change mechanism (28), a front-wheel drive assemly (22) having a front-wheel drive shaft (24) is disposed at a front side of the output shaft (17) and includes a clutch (55; 155; 255) such that when the change mechanism is shifted to its high-speed position the clutch is disengaged so as to provide a non-drive mode for front wheels. A selective drive mode is preferably provided by a one-way clutch (56) which is operable to connect the drive shaft to the output shaft only when forward directional rotation speed of the output shaft is larger than that of the drive shaft. In a preferred embodiment, the front-wheel drive assembly is shiftable at a low-speed position of the change mechanism between a constant drive mode and the selective drive mode.