Transmission system having a slider valve

A method for operating a transmission system comprising:

• engaging the clutch pack using a piston;
• pushing a slider valve to be in an open position using the piston;
• disengaging the clutch pack using the piston;
• keeping the slider valve in the open position based on pressure by clutch fluid on the slider valve;
• allowing lube oil to flow from a lube oil passage to the clutch pack when the slider valve is in the open position;
• and
• preventing lube oil from flowing from the lube oil passage to the clutch pack when the slider valve is in a closed position.

A machine comprising:

• an engine configured to provide rotational power;
• a transmission system configured to receive the rotational power from the engine, the transmission system comprising:
• a clutch pack;
• a piston configured to engage and disengage the clutch pack;
• a lube oil passage configured to transmit lube oil;
• a clutch fluid passage configured to transmit clutch fluid;
• a slider valve infinitely movable between an open position and a closed position and in fluid communication with the lube oil passage and the clutch fluid passage,
• wherein in the open position, the slider valve allows lube oil to flow from the lube oil passage to the clutch pack, and in the closed position, the slider valve prevents lube oil from flowing from the lube oil passage to the clutch pack, and
• wherein when the piston engages the clutch pack, the piston pushes the slider valve to be in the open position, and when the piston disengages the clutch pack, the slider valve is configured to remain in the open position based on pressure by the clutch fluid on the slider valve.