1991 MITSUBISHI 3000GT service

23-104AUTOMATIC TRANSAXLE - Differential
DIFFERENTIALM23LNAHI
DISASSEMBLY AND REASSEMBLY
\
.? ,,- ‘7Disassembly steps
9I)* 1. Bolt2. Differential drive gear
?163025
+* I)* 3. Bearing+* w+ 4. Lock pin++ 5. Pinion shaftI)+ 6. Pinionl a 7. Washerl * 8. SidegearI)* 9. SpacerIO. Differential cgse
r
SERVICE POINTS OF DISASSEMBLY3. REMOVAL OF BEARING
Using the special tool; remove the bearing.
TFA0231
14. REMOVAL OF LOCK PIN
Using a pin punch, drive
6ut the lock pin.
NOTEThe lock pin can be easily driven out.
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AUTOMATIC TRANSAXLE - Differential23405
\Pinion, shaftPinion gear/MD998822
TFY0040
SERVICE POINTS OF DISASSEMBLY9. INSTALLATION OF SPACER
/ 8. SIDE GEAR / 7.
WASHER
/ 6. PINION / 5. PINION SHAFT
(1) Fit the spacer to the back face of the side gear, then
install the gear into the differential case.
(2) Fit washer to back of pinion and rotate two pinions at
the same time into position to mesh with the side gear.
(3) Insert the pinion shaft
(4) Measure the backlash between the side gear and
pinion.
Standard value: 0.025
- 0.150 mm (.OOl - .0059 in.)
(5) If the backlash is out of specification, select the
appropriate spacer and disassemble and reassemble
the gears as necessary.
NOTEAdjust so that the backlash in both side gears equals.
4. INSTALLATION OF LOCK PIN
Align the lock pin hole in pinion shaft with that in the case
and install the lock pin.
Cautipn
The lock pin should be lower than the differential case
flange surface.3. INSTALLATION OF BEARING
Using the special tool, press-fit the bearings into both sides
of the differential case.
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23-106 AUTOMATIC TRANSAXLE -Differential / Speedometer Driven Gear Assembly
21002521
SPEEDOMETER DRIVEN GEAR ASSEMBLY1. INSTALLATION OF BOLTS
ICoat the differential drive gear bolts with
ATF and tighten
them to specification in the numerical order shown.
d
DISASSEMBLY AND REASSEMBLY
M23LOAF
201078
Disassembly steps
l *1. O-ring2. Spring pinl *3. Speedometer driven gear4. Oil seal5. Sleeve
Ls
Sli;
20107s
SERVICE POINTS OF REASSEMBLY3. INSTALLATION OF SPEEDOMETER DRIVEN GEAR
Apply gear oil sparingly to the speedometer driven gear
shaft and insert the shaft.
2. INSTALLATION OF SPRING PIN
Install the spring pin in such a way that its slit does not face
the gear shaft.
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25-1PROPELLER ~
SHAFT
~
CONTENTSM25AA- -I
PROPELLER SHAFT................................................3Lubricants................................................................2I
SPECIAL TOOLService Specifications........................................2........................................................3
SPECIFICATIONSTROUBLESHOOTING............................................3....................................................2
GeneralSpecificationsNoise and Vibration at High Speed........................................2Noise at Start

25-2PROPELLER SHAFT - Specifications
SPECIFICATIONSM25CA- -
GENERAL SPECIFICATIONS
Items
Propeller shaft
Type
Length x O.D.
mm (In.)
Front
Center
Rear
Universal joint
Type
No. 1 (front)
No. 2 (center front)
No. 3 (center rear) [Lobro joint]
No. 4 (rear)
Lubrication
Sizemm (in.)
Cross type joint journal O.D.
Constant velocity joint O.D.Specifications
4 joint propeller shaft
673.5 x 65 (26.52 x 2.56)
662.5 x 65 (26.08 x 2.56)
555.5 x 75 (21.87 x 2.95)
Cross type
Cross type
Constant velocity type
Cross type
Pre-packed type
16 t.63)
99.73 (3.93)
NOTEPropeller shaft length indicates the length between the center points of each joint
SERVICE SPECIFICATIONSM25CE -d
Items
Limit
Propeller shaft runout (Dial indicator reading)
Frontmm (in.)
Centermm (in.)
Rearmm (in.)
Specifications
0.6
l.024) or less
0.6
i.024) or less
0.6
t.024) or less
LUBRICANTSM25CD..
Items
Sleeve yoke surface
Lobro joint assembly
Outer and inner races ball grooves
Lobro joint assembly inner part
Rubber packing
Specified lubricant
Hypoid Gear
Oil/API classificationGL-4 or higher, SAE 75W-85W
Repair kit grease
Repair kit grease
3M ATD Part No. 8155 or equivalentQuantity
As required
As required
45-55g(1.59 - 1.94 oz.)
As required
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25-4PROPELLER SHAFT - ProDeller ShaftPropeller
LGbro joint
shaftL6bro Jointbootassembly
SERVICE POINTS OF REMOVALM25GEAI
3. REMOVAL OF PROPELLER SHAFT
(1) Make mating marks on the differential companion
flange and flange yoke.
CautionRemove the propeller shaft in a straight and level
manner so as to ensure that the boot is
notdamaged through pinching.
NOTEDamage to the boot can be avoided, and the work will
be easier, if a piece of cloth or similar material is
inserted in the boot.
(2) Use the special tool provided as a cover to prevent the
entry of foreign objects into the transfer.
4. REMOVAL OF SPACER
The number of spacers necessary may differ from one
location to another (front, rear, right, left). Record the
number of spacers used to ensure correct installation.
INSPECTIONM25GCAIl Check the sleeve yoke, center yoke and flange yoke for
wear, damage or cracks.
l Check the propeller shaft yokes for wear, damage or
cracks.
lCheck the propeller shaft for bends, twisting or damage.
l Measure the propeller shaft runout with a dial indicator.
Limit:
Front propeller shaft0.6 mm (.024 in.) or less
Center propeller shaft0.6 mm (.024 in.) or less
Rear propeller shaft0.6 mm (.024 in.) or less
NOTESet the V-blocks as much as possible to the end of the
shaft. Measure deflection at the center of the shaft.
d
Lj
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PROPELLER SHAFT - Propeller Shaft25-5
lOW504lOW505l Check the universal joints for smooth operation in all
directions.
l Check the center bearing for smooth movement.
lCheck the center bearing mounting rubber for damage or
deterioration.
Matlng marks10AOOl
j2
SERVICE POINTS OF INSTALLATION
3. INSTALLATION OF PROPELLER SHAFT
(I) Caution
M25GOAP
Be cautious to avoid damage to the oil seal lip of the
transfer.(2) Install the propeller shaft to the companion flange with
the mating marks properly aligned.
CautionTighten installation bolts after removing oil and
grease from threads to prevent them from loosen-ing due to lubrication.
2. INSTALLATION OF INSULATOR
Install spacers and insulators as indicated in the illustration.
Caution
When installing the center bearing, assemble the samespacers as removed from it (or new spacers of equal
thickness).
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PROPELLER SHAFT - Propeller Shaft25-7Mating marks
1ONOOOL
1 ON0003Mating marks
(commercially available)
\lOS520 'lOY507
SERVICE POINTS OF DISASSEMBLYM25GFAO
1. REMOVAL OF FRONT PROPELLER SHAFT ASSEMBLYPut mating marks on the front propeller shaft flange yoke
and the companion flange before removing the front
propeller shaft assembly.
3. REMOVAL OF COMPANION FLANGE
Put mating marks on the companion flange and the center
propeller shaft before removing the companion flange.
4. REMOVAL OF CENTER BEARING ASSEMBLY
First remove the center bearing bracket and then remove
the center bearing using a puller (commercially available).
5.REMOVAL OF CENTER PROPELLER SHAFT ASSEMBLYPut mating marks on the center propeller shaft, the Lobro
joint assembly and the companion flange before removing
the center propeller shaft assembly.
8. REMOVAL OF
LOBRO JOINT ASSEMBLY
(1) Remove the Lobro joint boot from the Lobro joint
assembly.
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