lock MITSUBISHI 3000GT 1991 Service Manual

25-6PROPELLER SHAFT - Propeller Shaft
DISASSEMBLY AND REASSEMBLY
M25GE- -
35 Nm25 ft.lbs.
16
.(? yo
4%
ia
1,
0 A;;. i ‘24
\
*
frLijbro joint Ltjbro joint(outer race) (inner race)loxools- ,0x00.0
Grease: Repair kit grease[45-55g(1.59-1.9402.)1lOFOOO3
Rubber mount
Disassembly steps
*I)I, Front propeller shaft assemblyI)+ 2. Self-locking nut** *+ 3. Companion flangea* l *4. Center bearing assembly*I) l +5. Center propeller shaft assembly6. Snap ringl *7. Boot band
+* I)* 8. Lobro joint assembly
9. Rubber packing+* ** IO. Lobro joint boot
11. Washer
12. Center propeller shaft
l + 13. Self-locking nut** l * 14. Companion flange41) l * 15. Center bearing assembly
16. Rear propeller shaft
lON0009
3M ATD Part No. 8155 or
equivalent
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PROPELLER SHAFT - Propeller Shaft25-9
L;Puller
[commercially available)
Companion flange
Rubber mountSelfnut-lockir
lON0007
e
lONO10X0018
15. REMOVAL OF CENTER BEARING ASSEMBLYFirst remove the center bearing bracket and then remove
the center bearing using a puller (commercially available).
INSPECTIONM25GIAAl Check the propeller shaft splines for wear or damage.
lCheck the ball grooves in inner or outer race for uneven
wear, damage or rust.
l Check ball surface for rust, wear or other damage.
l Check the cage for rust or damage.
SERVICE POINTS OF REASSEMBLYM25GHA.R
15. INSTALLATION OF CENTER BEARING ASSEMBLY
/ 14.COMPANION FLANGE
/ 13. SELF-LOCKING NUT
(1) Install the bearing in the rubber mount groove of the
center bearing bracket.
(2) Install the center bearing assembly to the rear propeller
shaft with its dust seal facing the companion flange
side.
(3) Install, lining up the mating marks on the companion
flange and the rear propeller shaft.
(4) While tightening the self-locking nut, install the center
bearing assembly with the companion flange.
10. INSTALLATION OF
LOBRO JOINT BOOT
Tape the serration of the center propeller shaft and then
install the Lobro joint boot.
8. INSTALLATION OF
LOBRO JOINT ASSEMBLY
Assemble the Lobro joint as follows:
(I) Apply a thin coat of the specified grease to the ball
grooves of the inner and outer races.
Specified grease: Repair kit
giease
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PROPELLER SHAFT - Propeller Shaft25-11
LMounting boltsL6bro
ioht boot1ouooll
/1ouoo17
5(9) Using the center propeller shaft bolt, align the bolt holes
of the Lobro joint boot and the Lobro joint assembly and
install the Lobro joint boot to the Lobro joint assembly.
(10)Check that the Lobro joint assembly moves smoothly.clio Dosition
7Boot band
1ouoo13
Companion flange
\Dust sealRubber/mount
I7. INSTALLATION OF BOOT BAND
Caution
Position the
boot,band clip on the side opposite to the
bosses which are provided in the boot for ventilation.
Be sure to remove grease, if present, from around the
bosses. Grease obstructs the ventilation air passage.5. INSTALLATION OF CENTER PROPELLER SHAFT
ASSEMBLYInstall, lining up the mating marks on the center propeller
shaft, the Lobro joint assembly and the companion flange.
4. INSTALLATION OF CENTER BEARING ASSEMBLY / 3.COMPANION FLANGE
/ 2. SELF-LOCKING NUT
(1) Install the bearing in the rubber mount groove of the
center bearing bracket.
(2) Install the center bearing assembly to the center
propeller shaft with its dust seal facing the companion
flange side.
(3) Install, lining up the mating marks on the companion
flange and the center propeller shaft.
(4) While tightening the self-locking nut, install the center
bearing assembly with the companion flange.
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26-6FRONT AXLE - Hub and Knuckle
HUB AND KNUCKLE
REMOVAL AND INSTALLATION
M261A- -
90
- 105 Nm
7 - 76 fubs.
T\
60-72Nm2001260 Nm
43 - 52 ft.‘bs.145 - 188 ftlbs.b
Ibs.UN002929Nm
200
- 260 Nm145- 188 ftlbs.llFO026
Removal steps
4*1. Front speed sensor connection
l *2. Cotter pin4* l +3. Drive shaft nut4*4. Caliper assembly5.Brake disc6. Front hub unit bearing7.Dust shield4*8. Lower arm ball joint connection
4*4*
4*
9.Cotterpin10. Tie rod end connection
11. Drive shaft
12. Front strut mounting bolt
13. Hub and knuckle14.Hub
NOTE*: Anti-lock braking system
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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

li
LREAR AXLE
- Troubleshootinn
TROUBLESHOOTINGM27EAAH
SymptomProbable cause
Remedy
4XLE SHAFT
Noise while wheelsBrake drag
Replace
are rotatingBent axle shaftWorn or scarred axle shaft bearing
Grease leakageWorn or damaged oil seal
Malfunction of bearing sealReplace
DRIVE SHAFTNoiseWear, play or seizure of ball jointExcessive drive shaft spline loosenessReplace
DIFFERENTIAL
(LIMITED SLIP
DIFFERENTIAL)Abnormal noise
during driving
or gear changing
NOTE
Excessive final drive gear backlashInsufficient drive pinion preload
Excessive differential gear backlash
Worn
spline of a side gear
Loose companion flange self-locking nut
Adjust
Adjust or replace
Replace
Retighten or replace
In addition to a malfunction of the differential carrier components, abnormal noise can also be caused by the
universal joint of the propeller shaft, the axle shafts, the wheel bearings, etc. Before disassembling any parts, takeall possibilities into consideration and confirm the source of the noise.
Abnormal noisewhen cornering
Gear noiseDamaged differential gears
Damaged pinion shaft
Insufficient gear oil quantity
Improper final drive gear tooth contact
adjustment
Replace
Replenish
Adjust or replace
Incorrect final drive gear backlash
Improper drive pinion preload adjustmentAdjust
Damaged, broken, and/or seized tooth surfacesof the drive gear and drive pinionDamaged, broken, and/or seized drive pinion
bearingsReplace
Damaged, broken, and/or seized side bearings
Damaged differential case
inferior gear oil
NOTE
Insufficient gear oil quantityReplenishNoise from the engine, muffler vibration, transaxle, propeller shaft, wheel bearings, tires, body, etc., is easily
mistaken as
being caused by malfunctions in the differential carrier components. Be extremely careful and
attentive when performing the driving test, etc.
Test methods to confirm the source of the abnormal noise include: coasting, acceleration, constant speed driving.
raising the rear wheels
on a jack, etc. Use the method most appropriate to the crrcumstances.TSB Revision

27-12REAR AXLE - Troubleshooting
Symptom
Gear oil leakageProbable cause
Worn or damaged front oil seal, or an improperly
installed oil seal
Damaged gasketRemedyReplace
Loose companion flange self-locking nut
Loose filler or drain plugRetighten or replace
Retighten or apply adhesive
SeizureClogged or damaged vent plug
Insufficient final drive gear backlash
Excessive drive pinion preload
Excessive side bearing preloadClean or replace
Adjust
Insufficient differential gear backlash
Excessive clutch plate preload
NOTE
Inferior gear oil
Insufficient gear oil quantity
Replace
Replenish
In the event of seizure, disassemble and replace the parts involved, and also be sure to check all components forany irregularities and repair or replace as necessary.
Break downIncorrect final drive gear backlashInsufficient drive pinion preloadInsufficient side bearing preload
Adjust
Excessive differential gear backlash
NOTE
Loose drive gear clamping boltsRetighten
In addition to disassembling and replacing the failed parts, be sure to check all components for irregularities andrepair or replace as necessary.
The limited slipThe limited slip device is damagedDisassemble, check the functioning
differential does notand replace the damaged partsfunction (on snow,mud, ice, etc.)TSB Revision

REAR AXLE - Service Adjustment Procedures2743
,,rmr
SERVICE ADJUSTMENT PROCEDURES
REAR AXLE TOTAL BACKLASH CHECKM27FAAG
If the vehicle vibrates and produces a booming sound due to an
imbalance of the driving system, measure the rear axle total
backlash by the following procedures to see if the differential
carrier assembly required removal.
(1) Place the gearshift lever in the neutral position, apply the
parking brake and jack up the vehicle.
(2) Manually turn the propeller shaft clockwise as far as it will
go and make mating marks on the companion flange dustshield and the differential carrier.
(3) Manually turn the propeller shaft counterclockwise as far as
it will go and measure the movement of the mating marks.Limit: 5 mm
(.2 in.)
(4) If the backlash exceeds the limit, remove the differential
carrier assembly and adjust the backlash. (Refer to P.27-26.)
GEAR OIL LEVEL CHECKM27FCAG1. Remove the filler plug, and check the oil level.
2. The oil level is sufficient if it reaches the filler plug hole.
Specified
gear oil:
Hypoid Gear Oil API classification GL-5 or higher
[l.l liter (1.2 q&J]
NOTEAbove -23°C (-10°F): SAE 90,
85W-90, 8OW-90From -34°C (-30°F) to -23°C (-10°F): SAE
8OW, 8OW-90Below -34°C (-30°F): SAE 75W
REAR WHEEL BEARING END PLAY CHECKM27FBAF1. Support the vehicle on axle stands positioned at the
specified locations and remove the rear wheel.
2. Separate the parking brake cable from the rear brake.
3. Remove the caliper assembly and brake disc.
4. Place a dial gauge as shown in the illustration, and then
measure the play when the axle shaft is moved in the axial
direction.Limit: 0.8 mm
(.031 in.)
5.If the play exceeds the limit, check the tightening torque ofthe companion flange of the axle shaft; if it is correct,
replace the wheel bearing.
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27-14REAR AXLE - Service Adjustment Procedures~
Incorrect
llA033CREAR WHEEL BEARING ROTATION TORQUE
I
CHECKM27FJAB1. Remove the drive shaft from the companion flange.
2. Remove the brake pad or caliper assembly.
3. Attach a spring balance to the hub bolt, then, pulling the
‘d ’balance at a right angle to the hub bolt, measure the
rotation torque (rotation starting torque) to see whether it iswithin the standard value.
Standard value: 12 N (2.6 Ibs.) [rotation starting torque0.7 Nm (6
in.lbs.)] or less
4. If the rotation starting torque exceeds the standard value,
check the tightening torque of the axle shaft companion
flange. If it is normal, replace the bearing.
LIMITED-SLIP DIFFERENTIAL CHECKM27FlAB
1.Block the front wheels and move the shift lever to neutral.2. Completely release the parking brake.
3. Jack up the rear wheels and place a rigid rack at the
specified part of the side sill.
4. Disconnect the coupling of the differential and propeller
shaft.LJ5. When one wheel is slowly rotated, check whether or not
the wheel on the other side turns in the same direction.
6.If it turns in the opposite direction, replace the viscous unit.
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