Direct (3, 5, R) Clutch Hydraulic Circuits (Applied in 3rd and 5th gear)
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
To release the direct clutch (B), In 1st, 2nd, 4th or 6th gear, the manual valve supplies line pressure to the clutch B regulator valve. The SSB lowers pressure to the clutch B regulator and clutch B latch valve to position the valves to lower the regulated line pressure in the CL B circuit to release the clutch.
In 2nd, 3rd, 4th, 5th and 6th gear, the D2 Latch valve directs exhaust circuit pressure from the CL EXH circuit to the CL B circuit to fill the circuit and the direct clutch (B) with fluid at low pressure, approximately 21 kPa (3 psi). This keeps air out of the Clutch B circuits resulting in smooth shifts when the clutch is applied in 3rd or 5th gear.