1991 MITSUBISHI 3000GT differential

27-38REAR AXLE - Differential Carrier
L
Snap ringllFOOO9
llFOOl0
11 FOO20
8-01
380
F‘/T\br -1lFOO12
(4) Using the special tool, to apply the preload, turn down
both right and left side bearing nuts on half the distancebetween centers of two neighboring holes.
\d(5) Fit the snap ring at either position shown to lock the
side bearing nut.
(6) Check the drive gear and drive pinion for tooth contact.
If poor contact is evident, make adjustment. (Refer to
P.27-28.)(7) Measure the drive gear
runout at the shoulder on the
reverse side of the drive gear.
Limit: 0.05 mm
(.002 in.)
(8) If the drive gear
runout exceeds the limit, reinstall by
changing the phase of the drive gear and differential
’
case, and remeasure.d
24. INSTALLATION OF OIL SEAL
(1) Using the special tool, install the oil seal flush with the
gear carrier end face.
(2) Apply a thin coat of Multi-purpose grease to the oil seal
lip.
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REAR AXLE - LSD Case Assembly27-39
LSD CASE ASSEMBLY
/DISASSEMBLY AND REASSEMBLYM27NE- -
L
Disassemblysteps1. Screw
l +2. Differential case A+I) I)+3. Thrust washer (L.H.)1 lFOO33
4. Viscous unit‘M 5. Pinion mate washer*a 6. Differential pinion mate7. Differential pinion shaft
8. Differential side gear (R.H.)l *9. Thrust washer (R.H.)l 10. Differential case B
Feeler gauge
INSPECTION BEFORE DISASSEMBLYM27NFAA
1. CHECKING THE DIFFERENTIAL GEAR BACKLASH
(1) Secure the differential case assembly in a vise so thatthe differential side gear (right) is facing upward.
CautionWhen securing the vise, be sure not to hold the
differential case assembly too tightly.
(2) Insert a 0.03 mm LOO12 in.) feeler gauge at two places
(diagonally) between differential case
I3 and the thrust
washer (right).
CautionDo not insert a feeler gauge in the oil groove of
differential case
B.
7--u/Differential side Thrust washer
gear (right)(right)llFO037

27-40REAR AXLE - LSD Case Assembly
r
Differential side
Differential
Differential
pinion mate
Thrust washer
llPO128
Pinion matewasherllPO12’
1 lFOO35(3) Insert the special tool at the spline part of differential
case B (right) and check to be sure the side gear (right)
rotates.
(4) Then insert a 0.09 mm t.0035 in.) feeler gauge to \Ljreplace a 0.03 mm
(.0012 in.) gauge.
(5) Insert the special tool at the spline part of the
differential side gear (right) and check to be sure the
side gear (right) does not rotate.
Differential gear backlash
Standard value (clearance in thiust direction ofside gear): 0.03
- 0.09 mm (.0012 - .0035 in.)
NOTE
If the clearance in the thrust direction of the side gear iswithin the standard value range, the backlash of the
differential gear is normal.
(6) If the clearance in the thrust direction of the side gear is
not within the standard value range, remove differentialcase A and make the adjustment by adjusting the
thickness of the thrust washer (left).
SERVICE POINTS OF DISASSEMBLYM27NGAA
3. REMOVAL OF THE THRUST WASHER (LEFT)
/ 9.
THRUST WASHER (RIGHT)The thrust washers (left and right) are of different thick-
ness, and so should be discriminated in some way for
reference during installation.
INSPECTIONM27NHAA
(1) Check the gears and differential pinion shaft for unusual
wear or damage.
(2) Check the spline part of the differential side gear (right) forstepped wear or damage.
(3) Check the thrust washer and pinion mate washer for
unusual wear of contact surfaces, heat damage or other
damage.(4) Check differential cases A and B for unusual wear of
contact surfaces, heat damage or other damage.
0: Contact surface with the viscous unit
0: Contact sur acef
with the pinion mate washer
@ and 0: Contact surfaces with thrust washer
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1

iREAR AXLE
- LSD Case Assembly27-41
viscous unit
bSpline part
(5) Check the spline part of the viscous unit for stepped wear
or damage, and check the contact surface with differentialcase
B.(6) Check the side gear (left) of the viscous unit for unusual
wear or damage.
Pinion mate
llPO134
Feeler qauqe
/11 FO03Feeler
Differential g;ar (right)Th‘rust kasher (righl
11 FOO3i
SERVICE POINTS OF REASSEMBLYM27NlhA
10. INSTALLATION OF THE DIFFERENTIAL CASE B
/ 2.
DIFFERENTIAL CASE A
Align the mating marks of differential cases B and A, and
assemble the cases.
6.INSTALLATION OF THE DIFFERENTIAL PINION MATE /5. PINION MATE WASHER
With the washer in the position shown in the illustration,
install to the differential pinion shaft, and then install to
differential case B.3. SELECTION OF THE THRUST WASHER (LEFT)
If the differential side gear and pinion mate gear have beenreplaced, select the thrust washer (left) by following the
steps below.
(1) Wash the differential side gear and pinion mate gear inunleaded gasoline to remove all oil, grease, etc.
(2) Install the previously used thrust washers (being carefulthe left and right ones are used at the correct side),
together with the gears, viscous unit, pinion mate
washer and pinion shaft, to differential cases A and B,and then, using screws, secure them temporarily.
(3) Secure the differential case assembly in a vise so thatthe differential side gear (right) is facing upward.
Caution
When securing in the vise, be sure not to hold thedifferential case assembly too tightly.
(4) Insert a 0.03 mm j.0012 in.) feeler gauge at two places
(diagonally) between differential case B and the thrust
washer (right).
CautionDo not insert a feeler gauge in the oil groove of
differential case B.
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Revision

27-42REAR AXLE - LSD Case Assembly
Feeler gaugeR-----
Feeler gauge‘\Feeler
gaugellFOO36
(5) Insert the special tool at the spline part of differential side
gear (right) and check to be sure the side gear (right)
rotates.
(6) Then insert a 0.09 mm l.0035 in.) feeler gauge to replace a0.03 mm
i.0012 in.) gauge.
(7) Insert the special tool at the spline part of the differential
side gear (right) and check to be sure the side gear (right)does not rotate.
Differential gear backlash
Standard value (clearance in thrust direction of sidegear): 0.03
- 0.09 mm (.0012 - .0035 in.)
NOTEIf the clearance in the thrust direction of the side gear is
within the standard value range, the backlash of the
differential side gear is normal.
(8) If the clearance in the thrust direction of the side gear is not
within the standard value range, remove differential case A
and make the adjustment by adjusting the thickness of thethrust washer (left).
Thrust washer (right) (reference)
0
NOTESelect one thrust washer (left) from the eleven types in the kit.TSB Revision

REAR SUSPENSION - Specifications
SPECIFICATIONS
GENERAL SPECIFICATIONS34-19M34CA-B
Items
Suspension system
Coil spring
Wire dia. x O.D. x free lengthmm (in.)
Coil spring identification color
Spring constantN/mm
(Ibs./in.)Shock absorberType
Max. lengthmm (in.)
Min. lengthmm (in.)
Strokemm (in.)
Damping force [at 0.3 misec. (0.9
ft./set.)]ExpansionN
(Ibs.)Contraction
N (Ibs.)Specifications
Double wishbone suspension type
12.2x105x379.3(.48x4.13x14.93)
Blue x 228.0
2 1.4 (I 57 -t 8)
Hydraulic, cylindrical, double-acting type
610
2 3 (24.0 f .I)407
f 3 (16.0 2 .I)
203 (8.0)Hard: 1,800
+ 250 (397 +- 55)
Medium: 1,200
rtr 170 (265 t 37)
Soft: 550
f 90(121 + 20)
Hard:
950? 140 (209 t 31)
Medium: 850
2 130 (187 + 29)
Soft: 650
f 100 (143 2 22)
SERVICE SPECIFICATIONSM34CB-B
ItemsSpecifications
Standard value
Toe-inmm (in.)0.5
k 2.5(.01 f .09)Camber
-0”lO’ Ifr 30'
Protruding length of stabilizer bar mounting boltmm (in.)5-7
(.197-,276)Lower arm ball joint starting torqueNm (in.lbs.)
2.0-9.0(17 - 78)Stabilizer link ball joint starting torqueNm
(inlbs.)1.7-3.2(15-28)Crossmember support bushing projectionmm (in.)
Upper part
15.5 (.59)Lower part
2.1-3.7(.08-.15)Differential support bushing projectionmm (in.)6.7-7.3
(.26-.29)
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34-24REAR SUSPENSION - Rear Suspension Assembly
REAR SUSPENSION ASSEMBLY
REMOVAL AND INSTALLATION
M34GA-B
L
Rel
145 Nm9- 33 ftlbs.
1. Shock absorber mounting nuts (upper)*
2. ECS connector
*Pre-removal Operationl Removal of the Rear Side Trim Absorber Lid
(RefertoGROUP52A-Trims.)l Removal of the Center Exhaust Pipe and Main Muffler
(Refer to GROUP 15
- Exhaust Pipe and Main Muffler.)
5. Brake caliper*
1,50-60NmI36 - 43 ft.lbs.35 Nm
$8 Nm“?C,ILc. ashwez I,..“=.BP’----12Nm9 ftlbs.
15..e12FO1088. Pressure tube assembly to pipe assembly
connection
<4WS>9. Feed pipe assembly to suction hose connec-
tion
<4WS>10. Return pipe assembly to rubber hose con-
nection t4WS>11. Power cylinder tie rod coupling nut <4WS>*12. Differential carrier to propeller shaft coupling
bolt and nut
Post-installation Operationl installation of the Center Exhaust Pipe and Main Muffler
(Refer to GROUP 15
- Exhaust Pioe and Main Muffler.)
l Installation of the Rear Side Trim Absorber Lid
(Refer to GROUP
52A-Trims.)13. Center bearing mounting nut
14. Harness connector connection
CABS>*15. Parking brake cable and ABS sensor fixingl Refilling and Bleeding of the Power Steering System
(Refer to GROUP
37A- Service AdjustmentProcedures.)bolt
*16. Cable band*
17. Crossmember bracket*
18. Crossmember mounting nut (on differential
side)”19. Rear suspension assemblyl Checking Wheel Alignment
(Refer to P.34-23.)
l Bleeding of 4WS System
(Refer to GROUP 37B
- Service Adjustment
Procedures.)
l Operation Inspection of the 4WS System
(Refer to GROUP 37B - Service AdiustmentProcedures.)
NOTEParts marked with * are symmetrical.
,* Checking the Parking Brake Lever Stroke
(Refer to GROUP 36 -Service Adjustment
Procedures.)i
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REAR SUSPENSION - Rear Suspension Assembly34-2512AOlOE
Dust shield12A022i
Press outMB991 387
MB991 38812N008E
Press-fitMB991 387
MB99089012N008f
SERVICE POINTS OF REMOVALM34GBAU17. REMOVAL OF CROSSMEMBER BRACKET
/ 18. CROSS-
MEMBER MOUNTING NUT (ON DIFFERENTIAL SIDE)
/19. REAR SUSPENSION ASSEMBLY
(1) Before removing the crossmember bracket, support the
differential case with the transmission jack.
(2) Remove the crossmember mounting bolt and nut.
NOTELowering the rear suspension assembly down from the
transmission jack requires three persons, as the rear
suspension assembly is very heavy. (Assign one person
to the differential and one each to the left and right
lower arm.)
(3) Apply a wood block to the ball joint of the lower arm to
prevent the dust shield from being deformed.
INSPECTIONM34GCAN2l Check the crossmember for cracks or deformation.
l Check the bushings for cracks or deterioration.
CROSSMEMBER SUPPORT BUSHING (FRONT)
REPLACEMENTM34GTAG
(1) Using the special tool, remove and press-fit the crossmem-
ber support bushing.
(2) When press-fitting the bushing, make sure that the hollow
portions are positioned as shown.
NOTEEnsure that the shift in rotating direction is within
+ 5”.
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