WORKING MACHINE

A working machine comprising: a ground engaging structure with a first and second axle, each mounting two wheels; a body supported on the ground engaging structure, a working arm mounted to the body; and a drive arrangement for moving the ground engaging structure to propel the working machine, the drive arrangement including a prime mover and transmission. The transmission comprises a hydraulic pump driven by the prime mover, a first high speed hydraulic motor to drive the first axle to permit the working machine to be drive at relatively high speeds in a first two-wheel drive operating mode, and a second low speed motor a first high speed hydraulic motor to be supplied with hydraulic fluid from the hydraulic pump to drive the second axle at relatively low speeds and configured to be driven in conjunction with the first motor in a second four-wheel drive operating mode.