1997 MITSUBISHI TRITON lock

AUTOMATIC TRANSMISSION ±
General Information/
Service Specifications23-2
GENERAL INFORMATION23100010141
ItemsVehicles with 4G63 engineVehicles with 4D56 engine
Transmission modelR4AW2-6V4AW2-6
Type4-speed full automatic4-speed full automatic
Gear ratio1st2.8262.826
2nd1.4931.493
3rd1.0001.000
4th0.7300.688
Reverse2.7032.703
Transfer type±2-speed
Gear ratioHigh±1.000
Low±1.925
Speedometer gear ratio (driven/drive)22/625/8
SERVICE SPECIFICATIONS23100030130
ItemsStandard value
Distance between inner cable stopper and end of outer cable <4G63> mm0 ± 1
Distance between inner cable stopper and end of outer cable <4D56> mm34 ± 35
Lock-up solenoid valve coil resistance (at 20
C) WApprox. 13
Stall speed r/min4G632,100 ± 2,400
4D562,300 ± 2,600
Governor pressure kPa1,000 r/min137 ± 166
2,000 r/min245 ± 284
3,200 r/min402 ± 460
Line pressure kPaAt idle speedD range480 ± 558
R range735 ± 852
At stall speedD range1,019 ± 1,195
R range1,519 ± 1,911
Operation temperature of engine coolant
temperature switch
C
On (continuity)50 + 3
tem erature switch
C
Off (no continuity)43
Clearance between shift lever guide and steering column mm2.4 ± 3.6

AUTOMATIC TRANSMISSION ± Troubleshooting23-6
Ye s
Carry out TEST 4 again.
Ye s
Does the engine brake function in L range?NoBrake No. 3 malfunction
No
Does the engine brake function in 2 range?NoBrake No. 1 malfunction
TEST 4
When traveling in 3-speed or 4-speed, shift to 2 and L. Does the
engine brake function in each range?Ye sTEST 5
Ye s

High line pressure

Accumulator malfunction

Check ball malfunctionCarry out TEST 5 again.
TEST 5
Is there abnormal noise(s) during acceleration and deceleration?
Is there shocks when slipping and changing speed?NoTEST 6
Ye s

Incorrect torque converter installation

Oil pump malfunction

Shifting gear not meshing correctly

Incorrect drive plate installationCarry out TEST 6 again.
TEST 6
Is there abnormal noise(s) or vibration when traveling in 3-speed
or 4-speed?NoTEST 7
NOTE
Abnormal noises and vibrations are often caused by an unbalanced propeller shaft, differential, tyre,
torque converter, engine, etc. Extremely thorough inspection is therefore required.
Ye s
Carry out TEST 7 again.
Ye s
Does lock up go on, off?No
Lock up signal valve malfunction

Lock up relay valve malfunction

Lock up clutch malfunction
No
Does the moment when lock up turns ON or OFF conform with
the shift pattern?No
Governor malfunction

Line pressure malfunction
TEST 7
Check that lock up ON, OFF. Does the shifting points conform
with shift pattern?Ye sCarry out the road test in 2 range.
NOTE
(1) Determine the moment when lock up turns ON by decreased engine r/min or by a slight shock back
and forth.
(2) Determine the moment when lock up turns OFF by increased engine r/min.
(3) Check lock up condition by pumping the accelerator slightly. If engine r/min rises in accordance with
throttle valve opening size, determine that the lock up is OFF, if not, determine it ON.
(When lock up is OFF, drive power is transferred through the fluid in the torque converter and therefore,
when the accelerator pedal is depressed, slipping occurs inside the torque converter with a resulting
large increase in engine r/min.)

2
8
D is assem bly s te p s
 In sp ectio n b efo re d is a sse m bly
( R efe r to P . 2 6-4 2.)
1 . C ove r
2 . B earin g c a p
 A
3. D if f e re ntia l c a se a sse m bly
4 . S id e b earin g s p ace r
5 . S id e b earin g o ute r r a ce
 B
6. S id e b earin g in ner r a ce
 C
7. D riv e g ear
 D
8. Lock p in
9 . P in io n s h aft
1 0. P in io n g ear
1 1 . P in io n w ash er
1 2. S id e g ear
1 3. S id e g ear s p ace r
1 4. D if f e re ntia l c a se
 E
15. S elf - lo ckin g n ut
1 6. W ash er
 F
17. D riv e p in io n a sse m bly 1
8. D riv e p in io n
1 9. D riv e p in io n fr o nt s h im ( fo r p in io n
h eig ht a dju stm ent)
 G
20. D riv e p in io n fr o nt b earin g in ner
r a ce
2 1. D riv e p in io n s p ace r
2 2. D riv e p in io n r e ar s h im ( fo r tu rn in g
t o rq ue a dju stm ent)
2 3. C om panio n fla nge
2 4. O il s e al
2 5. D riv e p in io n r e ar b earin g in ner r a ce
 H
26. D riv e p in io n r e ar b earin g o ute r
r a ce
 I
27. D riv e p in io n fr o nt b earin g o ute r
r a ce
2 8. O il s e al
2 9. G ear c a rrie r
3 0. P lu g c o ve r
3 1. Vent p lu g

REAR AXLE ± General Information27-2
GENERAL INFORMATION27100010118

The rear axle is a banjo-type semi-floating type.
The axle shaft bearings are: *Single taper
bearings for vehicles without ABS or rear
differential lock. *Double-taper bearings for
vehicles with ABS or rear differential lock. ABS
rotor is press-fitted to the axle shaft retainer
ring.
Differential gear has 4 different types. A
torque-responsive mechanical-type limited slip
differential has a high performance against
driving on unstable surfaces such as muddy
roads.

Driveability on sand or muddy road has been
improved, and rear differential lock, which is
useful for emergency , has been used.
REAR AXLE
ItemVehicles without rear differential lockVehicles with rear differential lock
Axle housing typeBanjo typeBanjo type
Axle
shaft
Support methodSemi-floating typeSemi-floating type
shaft
Shaft O.D. (Bearing part x
Centre x Length) mm40.0 x 34.5 x 744.540.0 x 34.5 x 723.5 (LH)
40.0 x 34.5 x 761.0 (RH)
Bearing typeSingle taper (double taper)*Double taper
Bearing (O.D. x I.D.) mm80.0 x 40.080.0 x 40.0
NOTE
*: Vehicles with ABS.
DIFFERENTIAL
<2WD>
Item4G634D56
Drive gear typeHypoid gearHypoid gear
Reduction ratio4.6364.222
Limited slip differential typeTorque sensitivity type mechanicalTorque sensitivity type mechanical
Differential gear type
(type x quantity)
Side gearStraight bevel gear x 2Straight bevel gear x 2
(ty e x quantity)
Pinion gearStraight bevel gear x 2 [Straight bevel
gear x 4]Straight bevel gear x 2 [Straight bevel
gear x 4]
Number of teethSide gear5138
Drive pinion119
Side gear1414
Pinion gear1010
Bearing (O.D. x I.D.)
mm
Side80.0 x 45.280.0 x 45.2
mm
Front68.3 x 30.268.3 x 30.2
Rear76.2 x 36.576.2 x 36.5
NOTE
[ ]: Vehicles with limited slip differential

REAR AXLE ± Service Specifications27-4
SERVICE SPECIFICATIONS27100030121
ItemStandard valueLimit
Rear axle total backlash mm±5
Axle shaft axial play mmVehicles without ABS or rear differential lock0.05 ± 0.20±
Vehicles with ABS or rear differential lock0 ± 0.25±
Limited slip differential
p
reload Nm
Using special tool13 or more±
reload Nm
Without using special tool25 or more±
Axle shaft retainer
press-fitting force NVehicles without ABS or rear differential lockInitial press-fitting force
49,000 or more±
Final press-fitting force
78,000±
Vehicles with ABS or rear differential lockInitial press-fitting force
49,000 or more±
Final press-fitting force
98,000 ± 108,000±
Clearance between axle shaft retainer and snap ring mm0 ± 0.166±
Rear differential lock air pump pressure kPa25 ± 40±
Drive gear backlash mm2WD0.08 ± 0.13±
4WD0.13 ± 0.18±
Drive gear runout mm±0.05
Differential gear backlash mm2WD0 ± 0.250.2
4WD0 ± 0.0760.2
Limited slip differential
starting torque Nm
When a new clutch plate is used39 ± 74±
starting torque Nm
When re-installing current clutch plate25 ± 74±
Drive pinion
turning torque NmWithout oil sealWhen replacing
(with anti-rust agent)0.6 ± 0.9±
When replacing or reusing
(with gear oil applied)0.4 ± 0.5±
With oil sealWhen replacing
(with anti-rust agent)0.8 ± 1.1±
When replacing or
reusing (with gear oil applied)0.6 ± 0.7±

REAR AXLE ± Service Specifications/Lubricants/Sealants27-5
ItemStandard valueLimit
Horizontal difference between friction plate and friction disc thickness mm0 ± 0.05±
Clearance between friction plate and friction disc mm0.06 ± 0.20±
Clearance in side gear axial direction mm0.05 ± 0.20±
Difference between left and right dimensions from back thrust face of pressure
ring to end of thrust washer mm0 ± 0.05±
Friction plate and friction disc warping (flatness) mm±0.08
Friction plate and friction disc wear
(difference in the thickness of the friction surface and the projections) mm±0.1
LUBRICANTS27100040049
ItemSpecified lubricantsQuantity
Rear differential gear oil
Conventional differential:
Hypoid gear oil
API classification GL-5 or higher SAE viscosity No. 90,
80 W

Limited slipdifferential:
2WD1.6


Limited sli differential:
Hypoid gear oil
MITSUBISHI Genuine Gear Oil Part No. 8149630 EX
CASTROL HYPOY LS (GL-5, SAE 90), SHELL-LSD
(GL-5, SAE 80W-90) or equivalent4WD2.6

SEALANTS27100050042
ItemsSpecified sealantsRemarks
Bearing case3M ATD Part No. 8661 or equivalentSemi-drying sealant
Dust cover
Axle housing (differential carrier mounting part)
Drive gear and differential case mounting part3M Stud Locking 4170 or equivalentAnaerobic sealant

1
8 <
C onven tio nal d if fe re n tia l>
< L im it e d s lip d if fe re n tia l>
1
7
25 2
7 3
2
0
21 2
2 23 24
2
9
11
1
2
13 1
4
1
2 1
5
6
7
16
65 2
1
2
5
6
1
5
5
614
13
10
9
11
12
8 7
1 9
2
1
3
3 0
2 8
2 6
4 4
D is assem bly s te p s
 In sp ectio n b efo re d is a sse m bly
( P .2 7-3 0.)
1 . Lock p la te
 A
2. S id e b earin g n ut
3 . B earin g c a p
 B
4. D if f e re ntia l c a se a sse m bly
5 . S id e b earin g o ute r r a ce
 C
6. S id e b earin g in ner r a ce
 D
7. D riv e g ear
 E
8. Lock p in
9 . P in io n s h aft
1 0. Thru st b lo ck < V ehic le s w it h out A BS>
1 1 . P in io n g ear
1 2. P in io n w ash er
1 3. S id e g ear
1 4. S id e g ear th ru st s p ace r
1 5. D if f e re ntia l c a se 1
6. Lim it e d s lip d if f e re ntia l c a se a sse m bly
 F
17. S elf - lo ckin g n ut
1 8. W ash er
 G
19. D riv e p in io n a sse m bly
2 0. D riv e p in io n fr o nt s h im ( F or a dju stin g
p re lo ad o f d riv e p in io n)
2 1. D riv e p in io n s p ace r
 H
22. D riv e p in io n r e ar b earin g in ner r a ce
2 3. D riv e p in io n r e ar s h im ( F or a dju stin g
d riv e p in io n h eig ht)
2 4. D riv e p in io n
2 5. C om panio n fla nge
 I
26. O il s e al
 I
27. D riv e p in io n fr o nt b earin g in ner r a ce
 I
28. D riv e p in io n fr o nt b earin g o ute r r a ce
 J
29. D riv e p in io n r e ar b earin g o ute r r a ce
3 0. D if f e re ntia l c a rrie r

ABS <2WD> ± Troubleshooting35B-7
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code No. 11, 12, 13, 14 Wheel speed sensor open circuit
or short circuitProbable cause
Code No. 21, 22, 23, 24 Wheel speed sensor abnormal
The ABS-ECU determines that an open circuit or short circuit occurs in more than
one line of wheel speed sensors.
Malfunction of wheel speed sensor

Malfunction of wiring harness or connector

Malfunction of ABS-ECU
These codes are output at the following times:

When an open circuit cannot be found, but more than one wheel speed sensor
does not output any signal during driving at 8 km/h or higher.

When a chipped or plugged-up rotor tooth, etc. is detected.

When the sensor output drops and anti-lock control is continuously carried out
due to a defective sensor or a warped rotor.
Malfunction of wheel speed sensor

Malfunction of rotor

Malfunction of wheel bearing

Malfunction of wiring harness or connector

Malfunction of ABS-ECU
NG
Replace the ABS-ECU.
OK
Check trouble symptoms.
OK
Check the following connector.
C-62NG
RepairOK
Wheel bearing check. (Refer to GROUP
26 and 27 ± On-vehicle Service.)
OK
Rotor check. (Refer to P.35B-40.)NGReplace the rotor.
OK
Wheel speed sensor output voltage
check. (Refer to P.35B-24.)NGWheel speed sensor check. (Refer to
P.35B-39.)NGReplace the wheel speed sensor.
OK
Measure at the ABS-ECU connectors
C-62

Disconnect the connector and
measure from the harness side.

Resistance values between 10 ± 23,
7 ± 20, 8 ± 21 and 9 ± 22.
OK: 1.2 ± 1.4 kWNGCheck the following connectors.
A-01, A-07, F-01, F-16, D-01 and C-02NG
Repair
Wheel speed sensor installation check.NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between each
wheel speed sensor and ABS-ECU, and
repair if necessary.