Patent ID: 7111459

Claim:
A vehicle comprising: a first hydraulic pump; a first hydraulic motor connected to the first hydraulic pump by a first hydraulic porting, wherein the first hydraulic pump, first hydraulic motor and first hydraulic porting are located in a first housing; a first axle shaft driven by the first hydraulic motor; a second hydraulic pump; a second hydraulic motor connected to the second hydraulic pump by a second hydraulic porting, wherein the second hydraulic pump, second hydraulic motor and second hydraulic porting are located in a second housing; a second axle shaft driven by the second hydraulic motor; a first bypass associated with the first hydraulic porting and located in the first housing; a first linkage connected to the first bypass; a second bypass associated with the second hydraulic porting and located in the second housing; and a second linkage connected to the second bypass; wherein the first bypass and the second bypass are actuated substantially simultaneously by a single actuating mechanism.