3-2 Detent Downshift (Valves Shown In Second Gear Position)

3-2 Detent Downshift - Valves Shown In Second Gear Position:

3-2 DETENT DOWNSHIFT (Valves Shown In Second Gear Position)

CONVERTER CLUTCH - RELEASED
SECOND CLUTCH - APPLIED
INPUT CLUTCH - APPLIED
INPUT SPRAG - OVERRUNNING
1-2 BAND - APPLIED

When the accelerator pedal is depressed far enough, the Throttle Valve (T.V.) plunger feeds T.V. pressure into the detent passage. During a 3-2 detent downshift T.V. oil pressure increases in proportion to T.V. plunger travel to the following valves:

3-2 Line Control Valve: When line pressure exceeds 759 kPa (110 psi.) the 3-2 line control valve opens and allows T.V. oil to enter the 3-2 downshift passage to shift the 2-3 shift valve train.

2-3 Shift Valve Train: At speeds below 65 mph (104 km/h), the 2-3 shift valve closes and directs oil pressure to the following:

a. Third clutch and 1-2 servo release oil exhausts at a rate controlled by the 3-2 control valve for proper shift timing of the third clutch exhaust and 1-2 servo apply.

b. Drive 4 oil fills the 2-3 accumulator exhaust passage and applies the 1-2 servo.

c. Line pressure fills the input clutch passage and applies the input clutch.

SUMMARY
It should be noted that a transaxle can shift from Third to Second, Third to First or Second to First depending on vehicle speed and throttle position.