Overdrive Range - First Gear

Overdrive Range - First Gear:

OVERDRIVE RANGE - FIRST GEAR

When the gear selector lever is moved to the Overdrive (D) position from the Neutral (N) position the following changes occur to shift the transaxle into Overdrive Range - First Gear.

Manual Valve: In the Overdrive position the manual valve routes line pressure into the drive fluid circuit. Also, the manual valve blocks line pressure from entering the PRN fluid circuit and opens the PRN fluid circuit to exhaust.


LO & REVERSE BAND RELEASES

Lo & Reverse Servo: Lo band fluid pressure exhausts from the servo, thereby releasing the servo and the lo & reverse band.


FORWARD CLUTCH APPLIES

Forward Clutch: Drive fluid is orificed into the forward clutch fluid circuit. Forward clutch fluid pressure applies the forward clutch.

1-2 Shift Solenoid: In first gear 1-2 shift solenoid remains energized by the PCM and 1-2 signal fluid pressure acts on the 1-2 shift valve.

1-2 Shift Valve: 1-2 Signal fluid pressure keeps the 1-2 shift valve in the downshifted position against spring force. Drive fluid is routed through the 1-2 shift valve.

Pressure Switch Assembly: Drive fluid is routed to the Pressure Switch Assembly (PSA) and the PSA signals the PCM that the transaxle is in the Overdrive range.