suspension MITSUBISHI 3000GT 1991 Repair Manual

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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34-20REAR SUSPENSION - Special Tools,.
SPECIAL TOOLSM34DA.Bremover anMB990241-01
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REAR SUSPENSION - Special Tools34-21
I’
id
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34-22REAR SUSPENSION - Troubleshooting
TROUBLESHOOTINGM34EA-B
Trailing arms deformed or damaged
Crossmember deformed or damaged
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REAR SUSPENSION - Service Adjustment Procedures34-23
SERVICE ADJUSTMENT PROCEDURES
REAR WHEEL ALIGNMENT INSPECTIONM34FDACCAMBER
Standard value:
-0”lO’ + 30’
To adjust camber, turn the lower arm mounting bolt on the
crossmember side.
NOTE
12FOO21Left wheel: Clockwise (0 camber)
Right wheel: Clockwise
(0 camber)
The difference between the right and left wheels
shoiuld be 30’
or less.
One graduation changes camber by about 12’.
\Trailing arm (L.H.)
\\12A0083
17FllO75TOE-IN
Standard value: 0.5
-t 2.5 mm (.Ol + .09 in.)
To adjust toe, turn the trailing arm mounting bolts on the
crossmember side on both sides the same amount.
NOTELeft wheel: Clockwise (toe-in)
Right wheel: Clockwise (toe-out)
The difference between right and left wheels should be 3 mm
(.12 in.) or less.
One graduation changes toe by about 2 mm
(.08 in.).
Caution
1. Adjust the eccentric cam bolt within 90” from’ the
central position.
2.Adjust camber and toe, in that order, and, if camber is
adjusted, be sure to adjust toe also.
3.For the vehicles with 4WS, make the adjustments with
the 4WS tie rod end disconnected from the trailing arm.
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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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34-26
REAR SUSPENSION - Rear Suspension, Assembly
I12FOO7C
I Press outMB990958-01
I--
I12N008
M B990958-01
112F007E12FOO791
(3) Make sure that the protrusion of the inner sleeve (dimen-
sion A and
B) are up to specifications.
Standard value
Dimension A: 15.5 mm
(.59 in.)
Dimension B: 2.1
- 3.7 mm (.08 - .15 in.)dCROSSMEMBER BUSHING (REAR) REPLACE-
MENTM34GTAH(1) Using the special tool, remove and press-fit the bushing.
(2) When press-fitting, position the bushing as shown.
NOTEEnsure that the shift in rotating direction is within t- 5”.
(3) Make sure that the protrusion of the inner sleeve (dimen-
sion A) is up to specification.
Standard value: 6.7
- 7.3 mm (.26 - .29 in.)
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REAR SUSPENSION - Upper and Lower Arm34-27
4slDust
cover12R0487
UPPER AND LOWER ARM
L
REMOVAL AND INSTALLATION
Post-installation Operation/ l $e;k pd ri;;k0ignrnent 1A
140- 160 NmIOI- 116ft.lbs.Upper arm removal steps
*I)1. Self-locking nut
2. Upper arm mounting nut
3. Upper arm
mounting.bolt4. Upper arm
Lower arm removal steps
5. Lower arm mounting nut
6. Lower arm mounting bolt
/
L;:Stabilizer link tolowerarm
Self-locking nut9.Lower arm
NOTE
140- 160 Nm*/3IOI- 116ftlbs.* gFor tightening points marked with *, first temporarily tighten
and then ground the vehicle to torque to specification where the
vehicle is empty.
SERVICE POINTS OF REMOVALM34SBAC1. REMOVAL OF SELF-LOCKING NUT
Using the special tool, disconnect the upper arm ball joint
from the knuckle.
NOTE(1) Do not remove the nut from the ball joint, but just
loosen it.
(2) Suspend the special tool with a rope to prevent it from
dropping.
c8. REMOVAL OF SELF-LOCKING NUT
Lower down the lower arm on the crossmember side.
Then, install the special tool and disconnect the lower arm
ball joint from the knuckle.
NOTE
(1) Do not remove the nut from the ball joint, but just
loosen it.
(2) Suspend the special tool with a rope to prevent it from
dropping.M34SA-B
‘80
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34-28
REAR SUSPENSION - Upper and Lower Arm
INSPECTIONM34SCACl Check the bushing for wear and deterioration.
lCheck the upper arm or lower arm for bend or breakage.
l Check the ball joint dust cover for cracks.
l Check all bolts for condition and straightness.12uoo1IB990800-01
Dust cover
Snap ring
17R019’
3CHECKING OF BALL JOINT FOR STARTING TORQUE
Mount two nuts on the ball joint, and then measure the ball
joint starting torque.
Standard value: 2
- 9 Nm (17 - 78 in.lbs.)
MB991 07312NOlOl
RemovalMB991 072
Press-fitMB991 072
MB991 07312NOlOC
1-
BALL JOINT DUST COVER REPLACEMENTM34SEAS2(1) Remove the dust cover.
(2) Apply multipurpose grease to the lip and inside of the dust
cover.
(3) Drive in the dust cover with special tool until it is fully
seated.
Ij
LOWER ARM BUSHING REPLACEMENTM34SFAC
(1) Use the special tool to remove and press-fit the bushing.
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