1991 MITSUBISHI 3000GT service

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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26-16FRONT AXLE - Drive ShaftllNOO3611AOO76
1
SERVICE POINTS OF DISASSEMBLYM26QFDE6. REMOVAL OF INNER SHAFT
(1) Using the special tool, remove the inner shaft assem-
bly, together with the seal plate, from the T.J. case.
NOTEPress the tool directly against the seal plate. The tool
under pressure will puncture and deform the seal plate,
and push out the inner shaft underneath.
(2) Use the special tool to remove the inner shaft from the
center bearing bracket.
11. REMOVAL OF CENTER BEARINGUse the special tools to remove the center bearing from the
center bearing bracket.
17. REMOVAL OF T.J. BOOT
/ 20. B.J. BOOT
(1) Wrap vinyl tape around the spline on the T.J. side of the
drive shaft so that the T.J. and B.J. boots are not
damaged when they are removed.
(2) Withdraw the T.J. and B.J. boots from the drive shaft.22.REMOVAL OF GREASE FROM B.J. ASSEMBLY
Wipe off grease from the B.J. assembly.
Caution
B.J. assembly cannot be disassembled.llKO07
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FRONT AXLE - Drive Shaft26-17
INSPECTIONM26QGDD
l Check the drive shaft for damage, bending or corrosion.
l Check the inner shaft for damage, bending or corrosion.
l Check the drive shaft splines for wear or damage.
l Check the inner shaft splines for wear or damage.
lCheck for entry of water and/or foreign material into B.J.
l Check the spider assembly for roller rotation, wear or
corrosion.
lCheck the groove inside T.J. case for wear of corrosion.
l Check the boots for deterioration, damage or cracking.
l Check the center bearing for seizure, discoloration or
roughness of rolling surface.
l Check the dust cover for damage or deterioration.
SERVICE POINTS OF REASSEMBLYM26QHDF
20. INSTALLATION OF B.J. BOOT
/ 17. T.J. BOOT
(1) Wrap vinyl tape around the splines on the drive shaft,
and then install the R.J. boots and T.J. boots, in that
order.
11 K03:
(2)Fill the inside of the B.J. and B.J. boot with the specified
grease.
Specified grease: Repair kit grease
145 g (5.11 oz.)
135 g (4.76 oz.)
Caution
1.The grease in the repair kit should be divided in
half for use, respectively, at the joint and insidethe boot.
2. Special grease is used to lubricate the joint. Do
not mix old and new grease or different types of
grease.(3) Secure the boot bands.
FWDAWD
B.J.bootband
T.J.
bootbandLarge20-22#BJ104
20-75#BJl OOL
Small20-I 5#BJ10420-72#BJlOO
Large20-131#BJlOO20-I 31 #BJlOO
Small20-72#BJlOO20-72#BJlOO
Caution1. The boot bands should be tightened with the
drive shaft at a 0” joint angle.
2. The B.J. boot band and T.J. boot band are
identified by the identification number stamped
on the lever. Take good care to install the correct
one.
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27-1
REAR AXLE
CONTENTSM27AA- -~
REAR AXLE . . . . . . . . . . . . . . . . . . . . . .._._..
AXLE SHAFT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
DIFFERENTIAL CARRIER. . . . . . . . . . . . . . . . . . . . . . . .._..........24
DRIVE SHAFT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
LSD CASE ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._.......39
SERVICE ADJUSTMENT PROCEDURES
. . . . . . . .13
Gear OilLevelCheck. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Limited-Slip Differential Check
. . . . . . . . . . .._...........14Rear Axle Total Backlash Check
. . . . . . . . . . . . . . . . . . . .13Rear Wheel Bearing End Play Check
_........... 13
Rear Wheel Bearing Rotation Torque
Check. . . . . . . . . . . . . . . . .._.............................................14
SPECIAL TOOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
SPECIFICATIONS................................................6General Specifications
....................................6Lubricants
............................................................7Sealants and Adhesives
....................................7Service Specifications
....................................7
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Axle Shaft
Grease leakage
Noise while wheels are rotatingDifferential (Limited Slip Differential)
Abnormal noise during driving or
gear changing
Abnormal noise when cornering
Break down
Gear noise
Gear oil leakage
SeizureThe limited slip differential does
not function
Drive Shaft
Noise
REAR AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REAR AXLEHUB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE ADJUSTMENT PROCEDURES........Rear Hub Rotary-sliding Resistance
(Torque)Inspection............................................Wheel Bearing End Play Inspection
................
SPECIFICATIONS................................................General Specifications
....................................Service Specifications
....................................
TROUBLESHOOTING. . . . . . . . . . .._....._.....................Abnormal Sound
24
3
3
32
2
2
2

27-2REAR AXLE - Specifications / Troubleshooting
REAR AXLE
SPECIFICATIONS
GENERAL SPECIFICATIONSM27CA.A
Items
Wheel bearing
Tvoe
Specifications
Unit ball bearina
SERVICE SPECIFICATIONS
Items
Limit
Wheel bearing end playmm (in.)
Rear hub rotary-sliding resistance
N (Ibs.)
Rear hub rotary-sliding torqueNm (ft.lbs.)
Specifications
0.05 l.002) or less
31 (7) or less
1.8 (1.30) or lessTROUBLESHOOTING
SymptomProbable causeRemedy
Abnormal sound
Loose wheel nuts
Damaged or worn wheel bearingsBent or distorted brake discsTighten
Replace‘d
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REAR AXLE - Service Adiustment Procedures27-3
llN00261 SERVICE ADJUSTMENT
PRbCEDURES
WHEEL BEARING END PLAY INSPECTIONM27FBAG
1.Inspect the play of the bearings while the vehicle is jacked
up and resting on floor jack.
2. Remove the hub cap and then release the parking brake.
3. Remove the caliper assembly and the brake disc.
4. Check the bearing’s end play.
Place a dial gauge against the hub surface; then move the
hub in the axial direction and check whether or not there is
end play.
Limit: 0.05 mm
(.002 in.) or less
NOTEIf the limit value is exceeded, the lock nut should be
tightened to the specified torque and check the end play
again.5. Replace the rear hub bearing unit if an adjustment cannot
be made to within the limit.
REAR HUB ROTARY-SLIDING RESISTANCE (TOR-
QUE) INSPECTION
M27FFAD
1.Inspect the play of the bearings while the vehicle is jacked
up and resting on floor jack.
2. Release the parking brake.
3. Remove the caliper assembly and the brake disc.
4.
5.After turning the
huba few times to seat the bearing, attach
a spring balance to the hub bolt, and, pulling at a 90” angle
from the hub bolt, measure to determine whether or not
the rotary-sliding resistance of the rear hub (the rotary-
sliding torque of the rear hub) is the standard value.
Limit:
Rear hub rotary-sliding resistance
31 N (7 Ibs.) or lessRear hub rotary-sliding torque
1.8 Nm (1.30 ft.lbs.) or less
NOTEIf the limit value is exceeded, loosen the nut and then
tighten it to the specified torque, and check the rear hub
rotary-sliding torque again.
Replace the rear hub unit bearing if an adjustment cannot
be made to within the limit.
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27-4
REAR AXLE - Rear Axle Hub
REAR AXLE HUB
REMOVAL AND INSTALLATION
M27MA- -
50-60Nm36 - 43 ftlbs.
200-260Nm145-188ftibs.Removal steps
4*4*1. Rear speed sensor 2. Calioer assemblv3.Brakedisc4. Hubcap
l *5. Wheel bearing nut4’6. Tongued washer7. Rear hub assembly4*8. Rear rotor 9. Rear hub unit bearing
Caution
Rear hub unit bearing cannot be disassembled.
llN0018
Pole p&e14NOlO-7
SERVICE POINTS OF REMOVALM27MBAC
1.REMOVAL OF REAR SPEED SENSOR
Caution
Be careful when handling the pole piece at the tip of thespeed sensor and the toothed edge of the rotor so as
not to damage them by striking against other parts.
2. REMOVAL OF CALIPER ASSEMBLY
Remove the caliper assembly and suspend it with a piece of
wire.
8. REMOVAL OF REAR ROTOR
CautionCare must be taken not to scratch or scar the rotor’s
toothed surface, and not to drop it.
If the rotor’s toothed surface is chipped or the rotor is
deformed, it might not be able to accurately sense the
wheel rotation speed and the system as a result mightnot perform normally.
14NOO99ITSB Revision