2-3 Shift Valve Train

The D2 fluid is routed between the 2-3 shuttle and the 2-3 shift valves and causes the following:

• Regardless of the operating conditions, the D2 fluid pressure holds the 2-3 shift valve in the downshift position against the AFL fluid pressure.
• The 2nd fluid is blocked from entering the 3-4 signal fluid circuit and the 3-4 signal fluid circuit is open to an exhaust port at the valve.
• The 3-4 clutch cannot apply with the 3-4 signal fluid exhausted. Therefore, third and fourth gears are hydraulically prevented.
• The 2nd fluid feeds the servo feed fluid circuit, but the 2nd fluid circuit has no function in manual second.
• The AFL fluid is blocked by the 2-3 shift valve and the D432 fluid circuit is exhausted through the valve.
• The overrun fluid is exhausted through the 2-3 shuttle valve.