Step-change transmission having charge and variable displacement pumps

摘要

A transmission is provided for a mobile machine. The transmission may have a plurality of available gear combinations selectively engaged to produce multiple stepped output ratios. The transmission may also have a first fluid pump and a second fluid pump. The first fluid pump may be configured to pressurize a first flow of fluid. The second fluid pump may have variable displacement to pressurize a second flow of fluid. At least one of the first and second flows of fluid may be directed to cause selective engagement of the plurality of available gear combinations.