1991 MITSUBISHI 3000GT ABS

34-2REAR SUSPENSION - Specifications
SPECIFICATIONS
GENERAL SPECIFICATIONS
Items
Suspension system
Coil spring
Wire dia. x O.D. x free lengthmm (in.)
Coil spring identification color
Spring constantN/mm (Ibs./in.)
Shock absorber
Type
Max. lengthmm (in.)
Min. lengthmm (in.)
Strokemm (in.)
Damping force [at 0.3 m/set. (.9 ftisec.)]
ExpansionN (Ibs.)
ContractionN (Ibs.)aheel
bearing
Type
Vehicles without ECSVehicles with ECS
Multi-link12X95X350
12.2x105x350(47 x 3.74 x 13.78)(.48x4.13x13.78)
Pink x 1
Orange x 1
352 1.8(196? 10.1)35+ 1.8(196+ 10.1)
Hydraulic cylindricaldouble-acting typeHydraulic cylindricaldouble-acting type
515
f 3 (20.2 i .I)515 + 3 (20.2 f .I)
356+3(14.0+.1)356 Ifr 3 (14.0 k .I)
159 (6.3)
159 (6.3)
1,000 + 150 (220 + 33)Hard: 1,800 ? 250 (397 f 55)
Medium: 1,200
rt 170 (265 + 37
Soft: 550
* 90 (121 f 20)
550_+80(121 + 18)Hard: 950 + 140 (209 k 31)
Medium: 850
* 130 (187 f 29)
Soft: 650
t- 100 (143 i 22)
Unit bail bearing
SERVICE SPECIFICATIONSM34CB.A
Items
Specifications
Standard value
Toe-in (Left-right difference)
mm (in.)
Camber
Stabilizer link ball joint starting torque
Nm (in.lbs.)
Ball joint rotation starting torque
Nm (inlbs.)
Stabilizer link protrusion
mm (in.)
Crossmember bushing projection,mm (in.)
I0.5 + 2.5
(.Ol + .09)
0” 2 30’
1.7-3.2(15-28)
2-9(17-78)
5-7(.197-,276)
8.5 - 9.5 (33 - .37)
Limit
Wheel bearing end playmm (in.)
Rear hub rotary-sliding resistance
N (Ibs.)
Rear hub rotary-sliding torqueNm (ftlbs.)0.05
(002) or less
31 (7) or less
1.8 (I .30) or lessTSB Revision

34-4REAR SUSPENSION - Troubleshooting
TROUBLESHOOTING
Symptom
Squeaks or other
abnormal noiseProbable cause
Loose rear suspension installation bolts and nuts
Malfunction of shock absorber
Worn bushings
Upper arms
and/or lower arms and/or assistlink deformed or damaged
Trailing arms deformed or damaged
Crossmember deformed or damaged
Excessive tire inflation pressure
Malfunction of shock absorber
Weakpr broken springs
Stabilizer bar and/or stabilizer link deformed
or damaged
Weak or deteriorated bushingsWeak or broken springs
Upper arms and/or lower arms and/or assistlink deformed or damaged
Trailing arms deformed or damaged
Crossmember deformed or damagedRemedy
Retrghten
Replace
Poor ride
Body tiltingAdjust the pressure
Replace
Replace
TSB Revision

REAR SUSPENSION - Rear Suspension Assembly34-7
REAR SUSPENSION ASSEMBLYM34GA-A
L/
REMOVAL AND INSTALLATION
140- 160 Nm*IOI- 116ftlbs.
Removal steps
1. Shock absorber mounting nuts (upper)2. ECS connector (ECS)3. Cap4. Brake line clamp bolt5. Brake caliper mounting bolt6. Brake caliper assembly7. Brake disc
8. Parkina brake cable clamo bolt
(Refer to GROUP 15 - Exhaust Pipe and
l * l +9. ParkinG brake cable end ”(Refer to GROUP 36 - Parking Brake.)10. Rear speed sensor clamp bolt (ABS)11. ABS speed sensor (ABS)12. Trailing arm mounting bolt and nut*I)13. Crossmember mounting nut*I)14. Rear suspension assembly
NOTE*.indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladencondition.
Post-installation Operationl Installation of the Main Muffler(Refer to GROUP 15 - Exhaust Pipe andMain Muffler.)l Check of Wheel Alignment(Refer.to P.34-5.)l Check of Parking Brake Lever Stroke(Refer to GROUP 36 -Service AdjustmentProcedures.)l Installation of the Absorber Lid to Rear Side Trim(Refer to GROUP 52A-Trims.)A12FOllO
SERVICE POINTS OF REMOVALM34GBAT
13. REMOVAL OF CROSSMEMBER MOUNTING NUT / 14.
REAR SUSPENSION ASSEMBLYSupport the crossmember with a transmission jack, then
remove the crossmember mounting nut and rear suspen-
sion assembly.
TSB Revision

REAR SUSPENSION -Upper Arm, Lower Arm and Assist Link34-9UPPER ARM, LOWER ARM AND ASSIST LINK
iREMOVAL AND INSTALLATION
LPre-removal Operation
l Removal of the Shock Absorber
(Refer to P.34-13.)Post-installation Operation
l Check of Wheel Alignment
(Refer to P.34-5.)l Installation of the Shock Absorber
(Refer to P.34-13.)Upper arm removal steps
1. Brake line clamp bolta*2. Self-locking nut
140- 160 Nm*IOl-116ft.lbs.”\
\
2
/7
75-89Nm54 - 64 ft.lbs.
140 - 160 Nm*101 - 116ft.lbs.*
8
3. Upper arm mounting bolt and nut
4. Upper armLower arm removal steps
5. Lower arm mounting bolt and nutl *6. Self-locking nut
7. Lower armAssist link removal steps
8. Assist link mounting bolt and nut4*9. Self-locking nut10. Assist link
NOTE*:indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladen
condition.
M34SA-S
Dustcover
rz412R0487
12A009$3TSB Revision
SERVICE POINTS OF REMOVALMSBAB2. 6. 9. REMOVAL OF SELF-LOCKING NUT
Using the special tool, disconnect the knuckle from the
upper arm, lower arm, and assist link.
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.

REAR SUSPENSION - Trailing Arm34-11
TRAILING ARMM34TA-A
t’REMOVAL AND INSTALLATION
,’
i;
18
90Nm* A65ft.lbs.* 15Post-installation Operation
lCheck of Wheel Alignment
‘Refer to P.34-5.)>heck of Parking Brake Lever Stroke(Refer tn GROIJP 36 - Service Adiustment
r/A -50-60Nm36 - 43ftlbs.
(Refer to GROUP 35 -Service Adjustment
-160Nm* -- 116ft.lbs.*Removal steps
1. Brake caliper mounting bolt
2. Brake caliper
3. Brake line clamp bolt
4. Rear brake disc5. Hubcap
6. Wheel bearing nut
7. Hub assembly
8. Parking brake cable clamp bolt*I) I)*9. Parking brake cable end (Refer to GROUP 36- Parking Brake.)IO. Rear speed sensor clamp bolt (ABS)
11. ABS speed sensor (ABS)
36 - 43 ftlbs.12FOlll
12. Backing plateI)+ 13. Stabilizer link mounting nutl I)14. Self-locking nut
15. Shock absorber mounting bolt (upper)
l *16. Self-locking nutl *17. Self-locking nut
18. Trailing arm mounting bolt and nut
19. Trailing arm assembly
NOTE*:indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladen
condition.
1 TSB Revision1

REAR SUSPENSION - Shock Absorber Assembly
SHOCK ABSORBER ASSEMBLYM34NA-A
iREMOVAL AND INSTALLATION
L
i
Pre-removal and Post-installation Operationl Removal and Installation of the Rear Side TrimRemoval steps
1. Shock absorber upper mounting nut
2. ECS connector (ECS)3. Cap
4. Brake line clamp bolt
5. Shock absorber lower mounting bolt
6. Shock absorber
NOTE*:indicates parts which should be temporarily tightened, and
then fully tightened with the vehicle in the unladen
condition.
45 Nm33 ft.lbs.12FOO87
DISASSEMBLY AND REASSEMBLYM34GMA
20-25 Nm
Disassembly steps
l * l a1, Piston rod tiahtenina nut2. Washer d u3. Upper bushing (A)** 4. Bracket assembly5. Upper spring pad6. Upper bushing (B)7.Collar
8.Cup assembly9.Dust cover10.Bump rubber+* 11. Coil spring12.Shock absorber
3
4
7
5
6
8
10
1280325:
TSB Revision

34-14REAR SUSPENSION - Shock Absorber Assemblv
12K(u9
‘7
Coil
,’I
seat12A0049
SERVICE POINT OF DISASSEMBLYM34GNAB1. REMOVAL OF PISTON ROD TIGHTENING NUT
(1) Before removing the piston rod tightening nut, corn-
press the coil spring using the special tool.
d(2) While holding the piston rod, remove the piston rod
tightening nut.
INSPECTIONM34GOACl
l Check the rubber parts for damage.
lCheck the coil springs for crack, damage or deterioration.
SERVICE POINTS OF REASSEMBLYM34GPAC
11. INSTALLATION OF COIL SPRING(1) Use the special tool
(MB990987-01) to compress the
coil spring and insert it in the shock absorber.
(2) Align the edge of the coil spring to the position of the
shock absorber spring seat as shown.
4. INSTALLATION OF BRACKET ASSEMBLY / 1. PISTONROD TIGHTENING NUT
(1) With the position of the bracket assembly as shown inthe figure, tighten the tightening nut to the specified
torque.
(2) Install the coil spring so that the lower edge fits into thespring seat groove and the upper edge fits into the
spring pad groove, then remove the special tool
’
(MB990987-01).L/iTSB Revision

REAR SUSPENSION - Rear Axle Hub
REAR AXLE HUB34-17
REMOVAL AND INSTALLATION
50-60Nm36 - 43 ftlbs.
1
Removal steps
*I)I, Rear speed sensor a*2. Caliper assembly
3. Brake disc
4. Hubcap
l +5. Wheel bearing nut
6. Tongued washer
7. Rear hub assembly
*I)8. Rear rotor 9. Rear hub unit bearing
Caution
Rear hub unit bearing cannot be disassembled.
llN0018
14NOlO14N009E
SERVICE POINTS OF REMOVALM34MBAC
1.REMOVAL OF REAR SPEED SENSOR ABS>Caution
Be careful when handling the pole piece at the tip of the
speed sensor and the toothed edge of the rotor so as
not to damage them by striking against other parts.
2. REMOVAL OF CALIPER ASSEMBLY
Remove the caliper assembly and suspend it with a piece of
wire.
8. REMOVAL OF REAR ROTOR ABS>Caution
Care must be taken not to scratch or scar the rotor’s
toothed surface, and not to drop it.
If the rotor’s toothed surface is chipped or the rotor is
deformed, it might not be able to accurately sense the
wheel rotation speed and the system as a result might
not perform normally.
TSB Revision1