1987 MAZDA 626 clutch

TROUBLESHOOTING (G4A-HL) 7B
Specified Line pressure:
Condition Line pressure kPa (kg/cm2, psi)
Range DSL R
When idling 350-490 (3.6-5.0, 51-71) 600-830 (6.1-8.5, 87-121)
At stall speed 980-1230 (10.0—12.5, 142—178) 1470-1960 (15.0-20.0, 213-284)
76G07B-063
Evaluation
Condition Possible Cause
Below specification
In all ranges
Worn oil pump
Below specification
In all ranges
Fluid leakage from the oil pump, control valve body
and/or transaxle case
Below specification
In all ranges Stuck pressure regulator valve
Below specification
In all ranges
Stuck throttle valve
Below specification
In all ranges
Stuck pressure modulator valve
Below specification
In D, 2 and 1 range
Fluid leakage from the forward clutch hydraulic circuit
Below specification
In D, 2 and 1 range Fluid leakage from the governor valve hydraulic circuit
Below specification
In D, 2 and 1 range
Fluid leakage from the N-R accumulator seal rings
Below specification In D and 1 range Fluid leakage from the 2-3 accumulator seal rings Below specification In D and 1 range Fluid leakage from the 1-2 accumulator seal rings Below specification
In D and R range Fluid leakage from the N-D accumulator seal rings
Below specification
In 2 and 1 range Fluid leakage from the coasting clutch hydraulic circuit
Below specification
In 2 and 1 range Stuck throttle backup valve
Below specification
In R and 1 range Fluid leakage from the low and reverse brake hydraulic
circuit
Below specification
In 2 range only Fluid leakage from 2-4 brake servo hydraulic circuit
Below specification
In 1 range only Stuck low reducing valve
Below specification
In R range only Fluid leakage from reverse clutch hydraulic circuit
Excessive line pressure
Stuck throttle valve
Excessive line pressure Stuck throttle modulator valve Excessive line pressure Stuck pressure regulator valve Excessive line pressure
Stuck throttle backup valve
76G07B-216
7B—59

7B DISASSEMBLY
DISASSEMBLY-STEP 2
Components
1. Piston stem
2. Snap ring
3. Clutch assembly
4. 2-4 brake band
5. Small sun gear and one-way clutch
6. Anchor strut and shaft
7. Servo
8. One-way clutch and carrier hub assembly
86U07B-135
—Low and reverse brake—
9. Retaining plate
10. Drive and driven plates
11. Internal gear
12. O-ring
13. 3-4 clutch assembly
14. Turbine shaft
7B—94

DISASSEMBLY 7B
Procedure
1. Remove the piston stem from the servo.
86U07B-136
2. Remove the clutch assembly.
(1) Remove the turbine shaft snap ring.
86U07B-137
(2) Pull the reverse and forward drum and remove
the clutch assembly.
86U07B-138
3. Remove the 2-4 brake band.
Note
Use a piece of wire to secure the brake band
so that it is not damaged by being stretched.
86U07B-139
7B—95

7B DISASSEMBLY
86U07B-142
4. Remove the small sun gear and one-way clutch.
5. Pull the anchor shaft while holding the strut, then
remove the strut.
6. Remove the servo.
(1) Remove the snap ring with the SST.
(2) Remove the servo and spring.
7. Remove the one-way clutch and carrier hub as-
sembly.
(1) Remove the snap ring.
7B—96

DISASSEMBLY 7B
86U07B-144
86.U07B-145
86U07B-146
(2) Remove the one-way clutch together with the
carrier hub assembly.
8. Remove the low and reverse brake assembly.
(1) Remove the snap ring.
(2) Remove the retaining plate and the drive and
driven plates.
9. Remove the internal gear.
(1) Remove the snap ring.
36U07B-147
7B-97

7B DISASSEMBLY
86U07B-148
86U07B-149
(2) Remove the internal gear from the 3-4 clutch
drum.
10. Remove the 3-4 clutch assembly.
(1) Remove the O-ring from the turbine shaft at the
converter housing side.
(2) Pull out the turbine shaft to remove the 3-4
clutch assembly.
(3) Remove the 3-4 clutch assembly.
86U07B-150
7B—98

INSPECTION AND REPAIR 7B
INSPECTION AND REPAIR
PRECAUTION
(1) Several of the parts resemble each other; organize them so that they do not get mixed up.
(2) Clean each part with cleaning oil, clean out the oil holes and oil passages with compressed air,
and check that there are no obstructions.
(3) When using cleaning oil and compressed air, wear protective eyewear.
(4) If a clutch plate or brake band is replaced with a new one, soak it in ATF for 2 hours or more
before installing.
(5) Before assembly, apply ATF to all seal rings, rotating parts, and sliding parts.
(6) All seals, gaskets and roll pins must be replaced with new ones during assembly.
(7) Use petroleum jelly, not grease where required.
(8) When it is necessary to replace a bushing, replace the assembly which includes that bushing.
76G07B-217
TORQUE CONVERTER
The torque converter is welded together and cannot
be disassembled.
Inspection
1. Check the outer part of the converter for damage
or cracks, and replace it if necessary.
2. Check whether there is any rust on the pilot hub
of the converter or on the boss. If there is any, re-
move it completely.
3. Measure the bushing of the converter boss. Re-
place the converter assembly if the bushing is
worn.
Bushing inner diameter
Standard: 53.030 mm (2.088 in)
Maximum: 53.076 mm (2.090 in)
Washing Inside of Converter
1. Drain any ATF remaining in the converter.
2. Pour in solvent [approximately 0.5 liter (0.53 US
qt, 0.44 Imp qt) ].
3. Shake the converter to clean the inside. Pour out
the solvent.
4. Clean the inside of the converter with compressed
air so that the inside is perfectly empty.
5. Pour in ATF.
6. Shake the converter to clean the inside. Pour out
the ATF.
7B—107

INSPECTION AND REPAIR 7B
CLUTCH ASSEMBLY
Disassembly
Disassemble in the sequence shown in the figure referring to the disassembly note for the specially
marked parts.
—Forward clutch—
1. Thrust bearings
2. Snap ring
3. Retaining plate
4. Drive and driven plates
5. Dished plate
—Coasting clutch—
6. Snap ring
7. Retaining plate
8. Drive and driven plates
9. Dished plate
10. Snap ring
11. Spring and retainer as-
sembly
12. Coasting clutch drum
13. Coasting piston
14. Outer seal
15. Inner seal
16. Outer seal
17. Seal rings
—Reverse clutch—
18. Snap ring
86U07B-189
19. Retaining plate
20. Drive and driven plates
21. Dished plate
22. Snap ring
23. Return spring stopper
24. Piston return spring
25. Reverse piston
26. Seal rings (inner and outer)
27. Reverse and forward drum
7B—113