Counter pressure chamber for hydraulic clutch

A transmission, comprising:

• a hydraulic clutch having a piston, a drum, and a washer;
• an actuation chamber defined between the piston and the drum and comprising an outer seal;
• and
• a counter-pressure chamber defined between the piston and the washer, the counter-pressure chamber comprising one or more of an inner seal, a spring, an inlet for a work fluid supply channel, and an outlet for a work fluid overflow channel.

A method for a hydraulic clutch, comprising:

• in response to receiving a first request for clutch engagement of a clutch, directing a flow of a work fluid into an actuation chamber via a first fluid passage fluidly coupled to the actuation chamber to increase pressure in the actuation chamber and engage the clutch;
• directing a volume of the work fluid that is greater than a volume of the actuation chamber into a counter-pressure chamber;
• and
• in response to receiving a second request for clutch disengagement of the clutch, directing a flow of the work fluid out of the actuation chamber via the first fluid passage to decrease pressure in the actuation chamber and disengage the clutch.