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4. 4th Gear
The flow of fluid to the 1-2, 2-3, and 3-4 shift valves is the same as in 3rd gear. When the speed of the vehicle reaches
the prescribed valve, shift control solenoid valve A is turned OFF (Shift control solenoid valve B remains OFF). As this
takes place, the 3-4 shift valve is moved to the left side and uncovers the fluid port leading to the 4th clutch. Since the
1-2 and 2-3 shift valves are kept on the left side, the fluid flows through the 4th clutch, and power is transmitted
through the 4th clutch.
Fluid flows by way of:
Hydraulic pressure also flows to the 1st clutch. However no power is transmitted through of the one-way clutch as in
2nd and 3rd gear.
NOTE: When used, "left" or "right" indicates direction on the hydraulic circuit.
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