wheel MITSUBISHI 3000GT 1991 Workshop Manual

AUTOMATIC TRANSAXLE - Troubleshootinn23-43
CONVERTER STALL TESTStall test consist of determining maximum engine
speed obtained at full throttle in “D” and
“I?”positions. This test checks torque converter
statoroverrunning clutch operation, and holding ability of
transaxle clutches and low-reverse brake.
Caution
During this test, make sure that no one stand in
front of or behind vehicle.
1. Check transaxle fluid level. Fluid should be at
normal operating temperature
[70 - 80°C (160 -
18O”F)I. Engine coolant should also be at normal
operating temperature
[80 - 90°C (180 - 19O”F)l.2. Apply chocks to both rear wheels.
3. Attach engine tachometer.
4. Apply parking and service brakes fully.
5. Start engine.
6. With selector lever in “D” position, depress
accelerator pedal fully to read engine maximum
rpm. Do not hold throttle wide open any longer
than is necessary to obtain maximum engine
rpm reading, and never longer than 5 seconds at
a time. If more than one stall test is required,
operate engine at approximately 1,000 rpm in
neutral for 2 minutes to cool transaxle fluid
between tests.
Stall speed: 2,200
- 3,200 rpm
7.Place selector lever to “R” position and perform
stall test by the same procedure as in foregoing
item.
Stall Speed Above Specification in “D”
If stall speed is higher than specification, rear clutch
or overrunning clutch of transaxle is slipping. In this
case, perform hydraulic test to locate cause of
slippage.
Stall Speed Above Specification in “R”
If stall speed is higher than specification, front
clutch of transaxle or low-reverse brake is slipping.
In this case, perform hydraulic test to locate cause
of slippage.
Stall Speed Below Specification in “D” and “R”
If stall speed is lower than specification, insufficient
engine output or faulty torque converter is sus-
pected. Check for engine misfiring, ignition timing,
valve clearance, etc. If these are good, torque
converter is faulty.
TRANSAXLE CONTROL
Symptom
Selector lever operationis stiff
Probable cause
Incorrect adjustment of sleeve
Remedy
Adjust
Incorrect adjustment of control cable
Excessive wear of detent plate
Worn contact surfaces of pushbutton
and sleeve
Adjust
Replace
Replace
Starter motor does notMalfunction in inhibitor switchReplace
operate with the selector
lever in the “N” or “P”Incorrect adjustment of control cableAdjust
position
Will not shift to
4-speed
Malfunction of starter relay
Malfunction of OD switchReplace
Replace
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26-2FRONT AXLE - Specifications
SERVICE SPECIFICATIONS
FWD
SPECIFICATIONS
GENERAL SPECIFICATIONS
Items
Wheel bearing
TypeDouble-row angular-contact
ball bearing
O.D. x I.D.mm (in.)
Drive shaft
Joint type
Outer
Inner
Lengthmm (in.)
L.H. shaft
R.H. shaft84 x 45 (3.31 x 1.77)
B.J.
T.J.
417 (I 6.4)
405 (15.9) or 393 (15.5)”
NOTE“1 M26CA-A
AWD
Unit ball bearing
B.J.
T.J.
419 (16.5)
391 (15.4)
M26CB-A
terns
standard value
Setting of T.J. boot length
mm (in.)
L.H.
R.H.
Limit
Hub end playmm (in.)
Wheel bearing starting torque(Hub starting torque) Nm (in.lbs.)
Specifications
85
f 3 (3.35 k .I 2)
85
+ 3 (3.35 +- .I 2)
0.05
(.002)
1.8 (16)
LUBRICANTSM26CO-A
Items
T.J. boot grease
B.J. boot grease


Dust seal inner
Dust seal outer
Specified lubricants
Repair kit grease
Repair kit grease
Multipurpose greaseQuantity
160 g (5.64 oz.)
145 g (5.11 oz.)
135 g (4.76 oz.)
14-2og (.49-.71 oz.)
8-12g(.28-.42oz.)
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26-4FRONT AXLE - Special Tools
ToolNumberName
MB991 248 or
MD998801
Inner shaft remover
MB990925-01
Bearing and oil sealinstaller set
MB990938-0 1Handle
7Use
Removal of the inner shaft
Removal of wheel bearing
M 8990932-01M B990938-01
Removal and installation of center bearingMB990930-01MB990932-01M 8990938-01
MB990925-01Tool numberInstaller disc O.D. mm (in.:
I
MB990926-01MB990927-01MB990928-01M B990929-01MB990930-01MB990931-01MB990932-01MB990933-01MB990934-01MB990935-01MB990936-01MB990937-0139.0
(1.54)45.0(1.77)49.5(1.95)
51 .o(2.01)54.0(2.13)57.0(2.24)
61 .O(2.40)63.5(2.50)67.5(2.66)71.5(2.81)75.5(2.97)79.0(3.11)
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FRONT AXLE - Troubleshooting / Service Adjustment Procedures
TROUBLESHOOTING
26-5
MPBEBAA
i.
Symptom
Vehicle pulls to one
side
Vibration
Shimmy
Excessive noiseProbable cause
Seizure of drive shaft ball joint
Abnormal wear, play or seizure of wheel bearing
Malfunction of front suspension or steering
Bend, damage or abnormal wear of drive shaft
Play in drive shaft and hub serration
Abnormal wear, play or seizure of wheel bearing
Improper wheel alignment
Malfunction of front suspension or steering
Broken boot, grease leakage
Bend, damage or abnormal wear of drive shaft
Play of drive shaft and hub serration
Abnormal wear, play or seizure of center bearing
Abnormal wear, play or seizure of wheel bearing
Loose wheel nut
Malfunction of front suspension and steering
Remedy
Replace
Replace
Adjust or replace
Replace
Replace
Replace
Adjust or replace
Adjust or replace
Replace, repack grease
Replace
Replace
Replace
Replace
Retighten
Adjust or replace
u11 A0285
SERVICE ADJUSTMENT PROCEDURES
HUB END PLAY INSPECTIONM26FAAE1. Jack up the vehicle and remove the front wheels.
2.Remove the disc brake caliper and suspend it with a wire.
(Refer to GROUP 35
- Service Adjustment Procedures.)
3.Attach a dial indicator as shown in the illustration, and then
measure the axial play while moving the hub back and forth.
Limit: 0.05 mm (.002 in.)
4.If axial play exceeds the limit, disassemble and check parts.
,
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i

FRONT AXLE - Hub and Knuckle26-7MB990998-01MB990635-01
II
I1 lA0286 1
SERVICE POINTS OF REMOVALM2618AH
1. DISCONNECTION OF FRONT SPEED SENSORRemove the mounting bolts which hold the speed sensor
bracket to the knuckle, and then remove the speed sensor.
Caution
Be careful when handling the pole piece at the tip of the
speed sensor and the toothed edge of the rotor so asnot to damage them by striking against other parts.
3. REMOVAL OF DRIVE SHAFT NUT
Loosen the drive shaft nut while the vehicle is on the floor
with the brakes applied.
Caution
Do not apply vehicle load to the wheel bearing loosingthe drive shaft nut. If, however, vehicle load must be
applied to the bearing in moving the vehicle, temporari-
ly secure the wheel bearing by using the special tools,
MB990998-01, etc.
4. REMOVAL OF CALIPER ASSEMBLY
Remove the caliper assembly and suspend it with wires.
8. DISCONNECTION OF LOWER ARM BALL JOINT
Using the special tool, disconnect the lower arm ball joint
from the knuckle.
Caution1. Be sure to tie the cord of the special tool to the
nearby part.2. Loosen the nut but do not remove it.
IO. DISCONNECTION OF TIE ROD ENDUsing the special tool, disconnect the tie rod end from the
knuckle.
Caution
1. Be sure to tie the cord of the special tool to the
nearby part.2. Loosen the nut but do not remove it.
11. REMOVAL OF DRIVE SHAFTUse the special tool to push out the drive shaft from the
front hub.
14. REMOVAL OF HUBIn the case of AWD-vehicles with A.B.S., take care not to
damage the rotor for A.B.S. installed to the B.J. outer race
when removing the hub.
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26-8FRONT AXLE - Hub and KnuckleI
INSPECTIONM26lCAEl Check the hub for cracks and spline for wear.
l Check the oil seal for damage.
l Check the knuckle for cracks.
l Check for defective bearing.
L)
NOTE
If the meshing of the wheel bearing outer race and the
knuckle, or of the wheel bearing inner race and the hub, is
loose, replace the bearing or damaged parts.
llFO041:ter
pinMEASUREMENT OF FRONT HUB UNIT BEARING ROTA-
TION STARTING TORQUE(1) Set the special tool to the front hub unit bearing.
(2) Holding the special tool (bolt), tighten its nut to 200 to 260
Nm (145 to 188 ft.lbs.).
(3) Turn the hub to cause grease to distribute evenly over the
bearing.(4) Measure the rotation starting torque of the hub.
Limit: 1.8 Nm (16
in.lbs.) or less
SERVICE POINT OF INSTALLATIONM261OAG
3.INSTALLATION OF DRIVE SHAFT NUT / 2. COTTER PIN
(I) Be sure to install the washer and wheel bearing nut in
the specified direction.
(2) After installing the wheel, lower the vehicle to the
ground and finally tighten the wheel bearing nut.
(3) If the position of the cotter pin holes does not match,
tighten the nut up to 260 Nm (188
ft.lbs.1 in maximum.
(4) Install the cotter pin in the first matching holes and bend
it securely.
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FRONT AXLE - Hub and Knuckle26-9
DISASSEMBLY AND REASSEMBLY
n
Disassembly stepsI)+
1. Oil seal (drive shaft side)*I)2. Hub and rotorl 4Adjustment of wheel bearing starting torque
3. Hub4. Rotor
5. Dust shieldl *6. Oil seal (hub side)
7. Snap ring
*I) l *8. Wheel bearing
9. Knuckle
/9Nm7 ftlbs.
L
MSIE- .
bi\/b ilR0036
SERVICE POINTS OF DISASSEMBLYM26lFAP2. REMOVAL OF HUB AND ROTOR
(1) Attach the special tools to the knuckle and front hub.
(2) Secure the knuckle in a vise.
(3) Tighten the nut of the special tool and remove the hub
and rotor from the knuckle.
Caution1. Be sure to use the special tools.
2. If the hub and knuckle are disassembled by
striking them with a hammer, the bearing will
be damaged.8. REMOVAL OF WHEEL BEARING
(1) Crush the oil seal in two places to that the tabs of the
special tool will be caught on the wheel bearing inner
race.(2) Remove the wheel bearing inner race from the hub by
using the special tool.
CautionBe careful that the hub will not fall down as the
wheel bearing inner race (outer side) is removed
from the hub.
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26-10
FRONT AXLE - Hub and KnuckleMB990938-01MB990932-01
/
llR00401 MB991355llL0124
12A0545MB990998-01MB990998-01(3) Remove the snap ring from the knuckle.
(4) Remove the bearing by using the special tools.
NOTERemoval is easier if the outer side inner race removedLJfrom the hub is placed on the bearing and the wheel
bearing is then removed.
INSPECTIONM261GAC
lCheck the hub and brake disc mounting surfaces for galling
and contamination.
l Check the knuckle inner surface for galling and cracks.
l Check for defective bearing.
SERVICE POINTS OF REASSEMBLYMZBIHAO8. INSTALLATION OF WHEEL BEARING
(1) Fill the wheel bearing with multipurpose grease.
(2) Apply a thin coating of multipurpose grease to the
knuckle and bearing contact surfaces.
(3) With the wheel bearing inner race removed, press-in
the bearing by using the special tools.
(4) Install the wheel bearing inner race to the wheel
bearing.
6. INSTALLATION OF OIL SEAL (HUB SIDE)
(1) Drive the oil seal (hub side) into the knuckle by using the
special tools until it is flush with the knuckle end
surface.
(2) Apply multipurpose grease to the lip of the oil seal and
_to the surfaces ot the 011 seal which contact the hub.d. ADJUSTMENT OF WHEEL BEARING STARTING
TORQUE
(I) Use the special tool to mount the hub assembly onto
the knuckle.
(2) Tighten the nut of the special tool to 200
- 260 Nm .(I45
- 188 ft.lbs.).
(3) Rotate the hub assembly in order to seat the bearing.llKO12
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(4) Measure the wheel bearing starting torque (hub starting
torque) by using the special tools.
Limit: 1.8 Nm (16
in.lbs.) or less
NOTEThe starting torque must be within the limit and, in
addition, the bearing must not feel rough when rotated.

26-12FRONT AXLE - Drive Shaft
-01
M 8990635-0112R0258
llA0286i
llN0027
SERVICE POINTS OF REMOVALM26QBAY2. REMOVAL OF DRIVE SHAFT NUT
Loosen the drive shaft nut while the vehicle is on the floor
with the brakes applied.
Caution
Do not apply vehicle load to the wheel bearing loosingthe drive shaft nut. If, however, vehicle load must be
applied to the bearing in moving the vehicle, temporari-
ly secure the wheel bearing by using the special tools,
MB990998-01, etc.
3. DISCONNECTION OF LOWER ARM BALL JOINT
Using the special tool, disconnect the lower arm ball joint
from the knuckle.
Caution1. Be sure to tie the cord of the special tool to the
nearby part.2. Loosen the nut but do not remove it.
5. DISCONNECTION OF TIE ROD END
Using the special tool, disconnect the tie rod end from the
knuckle.
Caution1. Be sure to tie the cord of the special tool to the
nearby part.
2. Loosen the nut but do not remove it.
7. REMOVAL OF DRIVE SHAFT AND INNER SHAFT
ASSEMBLY (L.H.)
/ 8. DRIVE SHAFT (R.H.)
(I) Using the special tool, push out the drive shaft and inner
shaft assembly (L.H.) or the drive shaft
(R.H.) from the
hub.(2) If the inner shaft is hard to remove from the transaxle,
strike the center bearing bracket lightly with a plastic
hammer.
‘\
L+i
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FRONT AXLE - Drive Shaft26-13
llE53C
HI/JbCotter pm
/‘Washer
llR0015(3) To remove the drive shaft
(R.H.) from the transaxle, pry
off the shaft using a lever against the protrusion of the
drive shaft.
Caution
Pulling the drive shaft can cause damage to the T.J.Be sure to use a lever.
INSPECTIONM26QCAGl Check the drive shaft boot for damage or deterioration.
l Check the ball joints for wear or operating condition.
l Check the spline part for wear or damage.
SERVICE POINT OF INSTALLATIONM26QLlAR2. INSTALLATION OF DRIVE SHAFT NUT
(1) Be sure to install the washer and wheel bearing nut in
the specified direction.
(2) After installing the wheel, lower the vehicle to the
ground and finally tighten the wheel bearing nut.
(3) If the position of the cotter pin holes does not match,
tighten the nut up to 260 Nm (188
ft.lbs.1 in maximum.
(4) Install the cotter pin in the first matching holes and bend
it securely.
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