Patent ID: 8821340

Claim:
A variator comprising: an endload chamber configured to apply an amount of force to a variator input disc in a first direction based on fluid pressure within the endload chamber; a subtraction chamber configured to apply an amount of force to the variator input disc in a second direction opposite the first direction based on fluid pressure within the subtraction chamber such that the net force applied to the variator input disc is reduced; and a valve having a first port fluidly coupled to the endload chamber and a second port fluidly coupled to the subtraction chamber, the valve being movable to a first position in which the endload chamber and the subtraction chamber are not fluidly coupled and to a second position in which the endload chamber and the subtraction chamber are fluidly coupled, wherein the subtraction chamber is sized to reduce the net force applied to the variator input disc by a percentage amount in the range of 5% to 10% when the valve is in the second position relative to the net force applied to the variator input disc when the valve is in the first position.