torque MITSUBISHI 3000GT 1991 Repair Manual

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.)
1 TSB Revision

SPECIAL TOOLS
FRONT AXLE - Special Tools26-3M26DA-A
MB990998-01
Front hub remover
and installerRemoval or press-in the front hub
Measurement of front hub unit bearing
rotation starting torque
of the hub
M B990955-01Oil seal installer
MB990890-01
M B990883-01Rear suspension
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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.

FRONT AXLE - Hub and Knuckle / Drive Shaft26-11
MB99
MB990890-01
llR0034
DRIVE SHAFT
REMOVAL AND INSTALLATIONRemoval steps(5) Measure to determine whether the end play of the hub
is within the specified limit or not.
Limit: 0.05 mm
(.002 in.)
(6) If the starting torque and hub end play are not within the
limit range while the nut is tightened to 200
- 260 Nm
(145
- 188 ft.lbs.), the bearing, hub and/or knuckle have
probably not been installed correctly. Repeat the dis-
assembly and assembly procedure.
1. INSTALLATION OF OIL SEAL (DRIVE SHAFT SIDE)
Drive the oil seal (drive shaft side) into the knuckle until it
contacts the snap ring.
Apply multipurpose grease to the lip of the oil seal.M26aA-
-
Pre-removal and Post-installation
60-72NmOperation60-72 Nm
/43-52ft.lbs.l Removal and lnstallatlon of43 - 52 ftlbs.the Under Covernl/ /40.
-I200 - 260 Nm
145 - 188 ftlbs.
1.Cotterpin+* l a2. Drive shaft nut4*3. Lower arm ball joint connection4.Cotterpin4*5. Tie rod end connection
6. Center bearing bracket installation bolt
4*7. Drive shaft and inner shaft assembly (L.H.14*8. Drive shaft (R.H.)
9.Circlip
11 NO026
Caution
In 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.
1 TSB Revision

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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REAR AXLE - Specifications
SERVICE SPECIFICATIONS27-7M27CEB
L
ItemsSpecifications
Standard value
Rear wheel bearing rotation torqueN
(Ibs.) [Nm (in.lbs.)l12 (2.6) lo.7 (6)] or less
Setting of T.J. boot length
mm (in.)
85 +_ 3 (3.35 f .12)
Final drive gear backlash
mm (in.)0.11 -0.16(.004-.006)
Differential gear backlash (Limited slip differential)
mm (in.)0.03 - 0.09 (.0012 -.0035)
Drive pinion rotation torque
Nm
(in.lbs.)
With oil seal
New part (with rust-prevention oil)0.5 - 0.7 (4 - 6)
New part/reusable part (gear oil application)
0.35
- 0.45 (3 - 4)
Without oil seal
New part (with rust-prevention oil)
0.3-0.5(3-4)
New part/reusable part (gear oil application)0.15 - 0.25 (1 - 2)
Limit
Rear axle total backlashmm (in.)5 (2)
Drive gear runout
mm (in.)0.05 (.002)
Rear wheel bearing end playmm (in.)0.8 (031)
LUBRICANTSM27CD.~Items
Specified lubricantsQuantity
i
Rear axle gear oilHypoid Gear Oil API classification GL-5 or higher1 .I lit. (1.2 qts.)
Above -23°C (-10°F) SAESO, 85W-90,8OW-90From -34°C (-30°F) to -23°C (-10°F) SAE 8OW, 8OW-90
Below -34°C (-30°F) SAE 75W
B.J. boot grease
T.J. boot greaseRepair kit grease125 g (4.41 oz.)
135 g (4.76 oz.)
SEALANTS AND ADHESIVESM27CE-.
I7.Specrfred sealants and adhesives
Drive gear threaded hole
Vent plug
Differential cover3M Stud Locking Part No. 4170 or equivalent
3M ATD Part No. 8663 or equivalentTSB Revision