Ford Falcon. Manual — part 231

307-01-27 Automatic

Transmission 307-01-27

DESCRIPTION AND OPERATION (Continued)

Hydraulic System - D2 and Sequential Sports Shift / Manual 2

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307-01-28 Automatic

Transmission 307-01-28

DESCRIPTION AND OPERATION (Continued)

Power Flow — D3 and Sequential Sport Shift

3/Manual 3

Drive is via the input shaft to the forward clutch

the 1-2 shift valve to provide an exhaust port

cylinder. Clutch C2 is engaged to drive the forward

when the transmission is shifted to first gear.

sun gear via the 3-4 OWC. Clutch C1 is engaged to

the 3-4 shift valve for use when the transmission

drive the planet carrier. Because the forward sun gear

is shifted to fourth gear.

and the planet carrier are driven clockwise at the

2nd oil at the 2-3 shift valve is directed to the 3rd oil

same speed there is no relative motion between the

circuit. 3rd oil from the 2-3 shift valve is directed to the

sun gear and the pinions. The ring gear and output

Clutch Apply Regulator valve and to the 4-3 sequence

shaft are driven in a clockwise or forward direction at

valve.

input shaft speed. The C4 clutch is applied to by-pass

Clutch Apply Feed oil is directed to:

the 3-4 OWC and provide engine braking on overrun.

the C1 clutch

Control

the 4-3 sequence valve

Solenoids S1, S2, S3 and S4 are switched OFF. With

At the 4-3 sequence valve the CAF oil is directed, as

solenoids 1 and 2 switched OFF the 2-3 and 3-4 shift

Band 1 Release Feed (B1R-F) oil, through the 3-4

valves are held in third gear position by Line 500

shift valve to the spring end of the 4-3 sequence valve

pressure. The 1-2 shift valve is held in third gear

and to the release side of the front servo piston to

position by S1-S2-S3 oil pressure. 2nd oil (Line

hold Band 1 OFF. Drive oil (Line pressure) from the

pressure) from the 1-2 shift valve is directed to the

3-4 shift valve applies the C4 clutch.

Band Apply Regulator valve and to the 2-3 shift valve.

The Band Apply Regulator valve supplies 2nd oil,

regulated to a pressure 1.8 times Line 500 pressure

less 191 kPa for the BAR spring (724 kPa) or for XR8

only 2.32 times Line 500 pressure less 237 kPa (946

kPa), to the Band Apply Feed (BAF) circuit.
Band Apply Feed oil is directed to:

the outer apply area of the Front Servo.

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307-01-29 Automatic

Transmission 307-01-29

DESCRIPTION AND OPERATION (Continued)

Hydraulic System - D3 and Sequential Sports Shift 3 / Manaul 3

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307-01-30 Automatic

Transmission 307-01-30

DESCRIPTION AND OPERATION (Continued)

Power Flow — D4 and Sequential Sports Shift

4/Manual 4

Drive is via the input shaft to the forward clutch

less 191 kPa for the BAR spring (724 kPa) or for XR8

cylinder. The C1 clutch is applied to drive the planet

only 2.32 times Line 500 pressure less 237 kPa (946

carrier clockwise. The B1 band is applied to hold the

kPa), to the Band Apply Feed (BAF) circuit.

reverse sun gear stationary. As the planet carrier

Band Apply Feed oil is directed to:

turns, the long pinion ‘walks’ around the stationary

the outer apply area of the front servo piston.

reverse sun gear and rotates around its axis driving

the inner apply area of the front servo piston via

the internal ring gear and output shaft in a clockwise

the 3-4 shift valve.

or forward direction at a speed faster than the input

shaft i.e. in overdrive ratio. The forward sun gear is

the 1-2 shift valve to provide an exhaust port

also driven faster than the input shaft and overruns

when the transmission is shifted to first gear. 2nd

the 3-4 OWC. The C2 clutch is engaged to reduce the

oil at the 2-3 shift valve is directed to the 3rd oil

speed differential across the 3-4 OWC.

circuit. 3rd oil from the 2-3 shift valve is directed

to the Clutch Apply Regulator valve and to the 4-3

Control

Sequence valve.

Solenoid S1 is switched ON.

The Clutch Apply regulator valve supplies oil,

regulated to a pressure 2.25 times Line 500 pressure

Solenoid S2 is switched OFF.

(1100 kPa) (93LE) 2.85 times Line 500 pressure

With solenoid S1 switched ON the 3-4 shift valve is

(1375 kPa) (97LE or XR’s), to the Clutch Apply Feed

held in fourth gear position by Line 500 pressure on

(CAF) circuit.

the small end of the valve. With solenoid S2 switched

Clutch Apply Feed oil is directed to:

OFF the 2-3 shift valve is held in fourth gear position

by Line 500 pressure on the large end of the valve.

the 4-3 Sequence valve

The 1-2 shift valve is held in fourth gear position by

the C1 clutch

S2 oil pressure. 2nd oil (Line pressure) from the 1-2

The C2 clutch is applied by Drive oil (Line pressure)

shift valve is directed to the Band Apply Regulator

from the Manual valve.

valve and to the 2-3 shift valve.
The Band Apply Regulator valve supplies 2nd oil,

regulated to a pressure 1.8 times Line 500 pressure

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