C. Second Range Operation

Because only one clutch is applied, the transmission goes to neutral. • If electrical power is interrupted with the transmission in first range, moving the manual selector valve to reverse will cut off main pressure to C1 clutch, exhausting C1 clutch. The manual selector valve directs main pressure through the F Trim Valve to the bottom of Shift Valve D, stroking the valve up and opening the path for main pressure to feed C5 clutch, keeping the clutch applied. A trim pressure is then directed to C3 clutch, applying the clutch. The combination of C3 and C5 clutch application produces reverse range operation, for limp home capability. NOTE: If the selector is put back in forward range after reverse has been attained, the selector valve will direct fluid to C1 clutch and Shift Valve D will stay up, directing fluid to C3 clutch, resulting in third range operation. • If electrical power is interrupted with the transmission in first range, resulting in only first, neutral and reverse operation, the engine may be shut down and restarted to attain neutral, third and reverse operation (reference Section A—Neutral).

C. Hydraulic Circuit—Second Range (Foldout 7) • Before shifting from first to second range, the TCM makes certain the C, D, and E Shift Valves are in the correct position with the C and E shift valves up and the D shift valve down.

• A Trim Solenoid is energized, opening the A trim signal pressure to exhaust and allowing the A Trim valve to move up, exhausting C5 clutch pressure. Trim Solenoid B is energized, raising the B trim signal and B Trim pressures.

The B trim pressure is directed through the C and E Shift Valves to C4 Clutch. The TCM provides current to B Solenoid, which controls the rate at which Trim Valve B supplies pressure to C4 clutch, and current to A Solenoid, which controls the rate at which C5 clutch is

exhausted, assuring a smooth transition to second range. Main pressure continues to feed through the E Shift Valve and manual selector valve, keeping C1 clutch applied. • The combination of C1 and C4 clutch application produces second range operation. • After the shift to second range is complete, the

D solenoid is de-energized allowing the D

Shift Valve to move up. C5 clutch feed, which was exhausted through Shift Valve D and the

A trim valve, now exhausts through exhaust backfill, keeping C5 clutch released. C3 clutch has an exhaust path through Shift Valve D to the A trim valve, keeping the C3 clutch released.

• Pressure switches C, D and E turn off, providing feedback that the valves are in the upward position. • If electrical power is interrupted with the transmission is in second range, A and B Trim

Solenoids de-energize. The normally open B

Trim Solenoid exhausts the B trim signal pressure, allowing the B trim valve to move up, exhausting C4 clutch. Normally closed

Trim Solenoid A blocks the exhaust of A trim signal pressure, allowing the A trim signal and

A Trim Pressures to rise. Trim Valve A directs full trim pressure through the D shift valve to

C3 clutch, applying the clutch. C1 clutch continues to be applied with main pressure through the E Shift Valve and Manual Selector

Valve. The combination of C1 and C3 clutches applied produces third range converter operation for limp home capability. • If the torque converter clutch was applied during the power interrupt, Solenoid F is deenergized and the transmission returns to converter operation. • If electrical power is interrupted with the transmission in second range and subsequent third range operation, moving the Manual

Selector Valve to neutral will cut off main pressure to C1 clutch and the clutch will be exhausted. C3 clutch remains applied.

Because only one clutch is applied, the transmission goes to neutral.