Overdrive Clutch Applies

Line pressure enters the 32 fluid circuit at the manual valve. 32 fluid is routed to the safety mode valve.

The 1-2 SS valve is energised, allowing feed limit fluid to enter the 1-2 signal fluid circuit. 1-2 signal fluid is routed to the safety mode valve and to the 3-4 shift valve.

1-2 signal fluid overcomes 3-4 shift valve spring force and moves the 3-4 shift valve to the applied position. This allows D432 fluid to enter the 123 fluid circuit, and allows direct clutch and 45 fluids to exhaust.

123 fluid seats the #4 ball check valve and passes through orifice #16 on the way to the 4-5 shift valve.

123 fluid passes throught the 4-5 shift valve (333) into the 123 braking fluid circuit.

123 braking fluid is regulated into the 123 regulated fluid circuit through the low pressure control valve (383).

123 regulated fluid passes through the 1-2 shift valve into the 23 regulated fluid circuit.

23 regulated fluid seats the #9 and the #11 ball check valves and is forced through orifices #22 and #23.

23 regulated fluid passes through the 2-3 shift valve into the overdrive clutch feed 1 fluid circuit.

Overdrive clutch feed 1 fluid seats the #12 ball check valve against the overdrive clutch feed 2 passage and enters the overdrive clutch fluid circuit.

Overdrive clutch fluid is then directed to the overdirve clutch piston to apply the overdrive clutch plates.