1987 MAZDA 626 Workshop Manual

TRANSAXLE CONTROL 7 A
63U07A-151
61G07X-192
63U07A-153
Spring
Remove the spring by prying on the hooked part of
the spring with a screwdriver.
INSPECTION
Check the following, and replace if necessary:
1. Bent control rod.
2. Wear, damage, or malfunction of any joint.
3. Damaged gear shift lever ball.
4. Weak spring.
5. Wear or damage of bushing.
INSTALLATION
Install in the reverse order of removal and note the
following:
Extension Bar
First, install the extension bar to the floor, and then
install it onto the transaxle.
Tightening torque:
31—46 Nm (3.2—4.7 m-kg, 23—34 ft-lb)
Bracket Installation
Tighten the bracket installation nuts to the specified
torque.
Tightening torque: 7—10 N-m
(70—100 cm-kg, 61—87 in-lb)
76G07A-071
7A-59

7A TRANSAXLE CONTROL
Gear Shift Lever Ball
Apply grease to the ball seat surface, and install the
upper and lower ball seat, holder, and boot.
Note
Apply grease to all joints.
61G07X-193
Spring
Make sure that the hooked part of the spring is
properly seated in the bracket groove, as shown in
the figure.
63U07A-156
Bracket Cavity
Put grease in the bracket cavity.
63U07A-157
Change Control Rod
Install the change control rod so that its relationship
with the shift lever is as shown in the figure.
Tightening torque:
16—22
N
m (1.6—2.3 m-kg, 12—17 ft-lb)
61G07X-195
7A-60

7B
AUTOMATIC TRANSAXLE
(Electronically Controlled and 4-Speed)
OUTLINE 7B— 2
SPECIFICATIONS 7B— 2
COMPONENT LOCATION 7B— 3
STRUCTURAL VIEW 7B— 5
OPERATION OF COMPONENTS 7B— 6
FLUID PASSAGE LOCATION 7B— 9
TROUBLESHOOTING (G4A-EL) 7B— 12
GENERAL NOTE 7B— 12
STEP 1
(WARNING CODE RETRIEVAL) 7B— 15
STEP 2
(PRELIMINARY INSPECTION) 7B— 22
STEP 3 (SIGNAL INSPECTION) 7B— 24
STEP 4 (STALL TEST) 7B— 27
STEP 5 (TIME LAG TEST) 7B— 30
STEP 6 (OIL PRESSURE TEST) 7B— 31
STEP 7 (ROAD TEST) 7B— 34
TROUBLESHOOTING (G4A-HL) 7B— 41
GENERAL NOTE 7B— 41
STEP 1
(PRELIMINARY INSPECTION) 7B— 44
STEP 2 (ELECTRICAL
SYSTEM INSPECTION) 7B— 47
STEP 3 (STALL TEST) 7B— 49
STEP 4 (TIME LAG TEST) 7B- 52
STEP 5 (ROAD TEST) 7B— 53
STEP 6 (OIL PRESSURE TEST) 7B— 58
ELECTRICAL SYSTEM
COMPONENTS 7B— 63
MODE SWITCH (G4A-EL) 7B— 63
HOLD SWITCH (G4A-EL) 7B— 63
OD OFF SWITCH (G4A-HL) 7B— 64
INHIBITOR SWITCH 7B- 65
WATER TEMPERATURE SWITCH 7B— 66
FLUID TEMPERATURE SWITCH
(G4A-EL) 7B— 66
BRAKE LIGHT SWITCH
(G4A-EL) 7B— 66
KICK-DOWN SWITCH (G4A-HL) 7B— 67
PULSE GENERATOR (G4A-EL) 7B- 68
VEHICLE SPEED SENSOR
(G4A-EL) 7B— 68
CRUISE CONTROL SWITCH
(CRUISE CONTROL UNIT) 7B— 68
IDLE SWITCH AND THROTTLE
SENSOR (G4A-EL) 7B— 68
OD RELEASE SOLENOID
VALVE (G4A-HL) 7B— 68
SOLENOID VALVES (G4A-EL) 7B— 69
NO LOAD SIGNAL (G4A-EL) 7B— 69
MODE, AND HOLD INDICATOR
LIGHT (G4A-EL) 7B— 69
OD OFF INDICATOR LIGHT
(G4A-HL) 7B— 69
EC-AT CONTROL UNIT
(G4A-EL) 7B— 69
ON-VEHICLE MAINTENANCE 7B— 71
AUTOMATIC TRANSAXLE
FLUID (ATF) 7B— 71
SELECTOR LEVER 7B— 72
THROTTLE CABLE 7B— 73
CONTROL VALVE BODY 7B— 77
OIL STRAINER 7B— 79
ADJUSTMENT OF 2-4 BRAKE
BAND 78— 80
REPLACEMENT OF
DRIVESHAFT OIL SEAL 7B— 80
OIL COOLER 7B— 81
GOVERNOR (G4A-HL) 7B— 82
REMOVAL 7B— 83
PRECAUTION 7B— 83
DISASSEMBLY 7B— 88
DISASSEMBLY-STEP 1 7B— 88
DISASSEMBLY-STEP 2 7B— 94
DISASSEMBLY-STEP 3 7B— 99
DISASSEMBLY-STEP 4 7B—103
INSPECTION AND REPAIR 7B—107
PRECAUTION 7B—107
TORQUE CONVERTER 7B—107
OIL PUMP 7B—108
CLUTCH ASSEMBLY 7B—113
SMALL SUN GEAR AND
ONE-WAY CLUTCH 7B—122
ONE-WAY CLUTCH AND
CARRIER HUB ASSEMBLY 7B-126
3-4 CLUTCH 7B—128
2-3 ACCUMULATOR 7B—132
GOVERNOR ASSEMBLY
(G4A-HL) 7B-133
LOW AND REVERSE BRAKE 7B—134
2-4 BRAKE BAND 7B—135
BAND SERVO 7B—135
OTHER INSPECTION 7B—135
CONTROL VALVE BODY
(G4A-EL) 7B-136
CONTROL VALVE BODY
(G4A-HL) 7B-155
DIFFERENTIAL 7B—177
OUTPUT GEAR 7B—181
IDLE GEAR 7B—182
BEARING COVER ASSEMBLY 7B—185
BEARING HOUSING 7B—186
ASSEMBLY 7B-187
PRECATION 7B—187
ASSEMBLY-STEP 1 7B—187
ASSEMBLY-STEP 2 7B—197
ASSEMBLY-STEP 3 7B—202
ASSEMBLY-STEP 4 7B—208
INSTALLATION 7B—215
TORQUE SPECIFICATIONS 7B—215
HYDRAULIC CIRCUIT (G4A-EL) 7B—221
HYDRAULIC CIRCUIT (G4A-HL) 7B—239
76G07B-001

7B OUTLINE
OUTLINE
SPECIFICATIONS
Model G4A-EL (EC-AT) G4A-HL (4-speed) Model G4A-EL (EC-AT)
FE engine F8 engine

Torque converter stall torque ratio 1.710—1.900
: 1
1.900-2.100
: 1

Gear ratio
First 2.800
Gear ratio
Second 1.540
Gear ratio Third 1.000 Gear ratio
Fourth (OD) 0.700
Gear ratio
Reverse 2.333
Final gear ratio 3.700
Number
of
drive plates/ driven plates
Forward clutch 3/3
Number
of
drive plates/ driven plates
Coasting clutch 2/2
Number
of
drive plates/ driven plates 3-4 clutch 5/5 4/4 Number
of
drive plates/ driven plates
Reverse clutch 2/2
Number
of
drive plates/ driven plates
Low and reverse brake 3/3 4/4
Servo diameter (Piston outer dia./retainer inner dia.) mm (in) 78/53 (3.07/2.09) 78/49 (3.07/1.93) 78/56 (3.07/2.20)
Speedometer gear ratio (Driven/Drive gear) 20
: 25 or
21
: 25

Automatic transmission luid
Type Dexron
n or
MED
Automatic transmission luid Capacity
liters (US qt, Imp
qt)
6.8 (7.2, 6.0)

76G07B-002
7 B—2

OUTLINE 7B
COMPONENT LOCATION
G4A-EL
76G07B-003
1. Hold indicator light
2. EC-AT control unit
3. Vehicle speed sensor
4. Mode indicator light
5. Cruise control unit
6. Cruise control switch
7. Mode switch
8. Hold switch
9. Water temperature switch
10. Throttle sensor and idle
switch
11. Fluid temperature switch
12. EC-AT
13. Pulse genelator
14. Solenoid valves
15. Inhibitor switch
7B-3

7B OUTLINE
G4A-HL
1. OD OFF indicator light
2. OD OFF switch
3. Kick-down switch
4. Cruise control unit
5. Cruise control switch
6. Water temperature switch
7. Inhibitor switch
8. OD release solenoid valve
9. Automatic transaxle
76G07B-004
7B—4

OUTLINE 7B
STRUCTUAL VIEW
76G07B-005
1. Coasting clutch 7. Low and reverse brake
2. Forward clutch 8. Output gear
3. Reverse clutch 9. Idle gear
4. Reverse and forward drum 10. Differential
5. 3-4 clutch 11. Parking pawl
6. 2-4 brake band 12. Throttle cable
13. Control body
14. Oil pump
15. Inhibitor switch
16. Pulse generator
17. Fluid temperature switch
7B—5

7B OUTLINE
OPERATION OF COMPONENTS
Low and reverse brake
76U07B-508
Operation Table (G4A-EL)
Range Gear Engine
braking
effect
Operation elements
Range Gear Engine
braking
effect Forward
clutch
Coasting
clutch 3-4
clutch Reverse
clutch
2-4 brake Loftrmm
brake
One-way
clutch 1
One-way clutch 2
Range Gear Engine
braking
effect Forward
clutch
Coasting
clutch 3-4
clutch Reverse
clutch Aoolied Released
Loftrmm
brake
One-way
clutch 1
One-way clutch 2
P — —
R Reverse Yes O O
N -—
D
1st No O O O
D
2nd No o O 0
D 3rd
Below approx.
40 km/h (25 mph)
Yes o O 0 O 0 D 3rd
Above
approx.

40 km/h (25 mph)
Yes 0 o o ® o o
D
OD Yes © o o
S
1st No o 0 o
S
2nd No o 0 0
S
3rd

Below
approx,
40 km/h (25 mph)
Yes 0 0 0 0 o S
3rd Above approx.

40 km/h (25 mph)
Yes o o o ® o o
L 1st No o O o o L 2nd Yes 0 0 o o

HOLD

D
2nd No o o o

HOLD

D 3rd

Below
approx.

40 km/h (25
mpti) Yes o o o 0 o

HOLD

D 3rd Above approx,
40 km/h (25 mph)
Yes o 0 o ® 0 o

HOLD
S
2nd Yes o o 0 o

HOLD
S 3rd
Below approx.
40 km/h (25 mph)
Yes 0 o o 0 o
HOLD
S 3rd Above approx.

40 km/h (25 mph)
Yes o o o ® 0 o

HOLD

L 1st Yes o o o o o

HOLD

L 2nd Yes o 0 0 o
®: Indicates fluid pressure to servo but band not applied due to pressure difference in servo. 76G07B-006 © : Indicates that it does not function to transmition power.
7B-6