differential MITSUBISHI MONTERO 1991 Workshop Manual

1984-86 ................................. (2) 7.2 Qts. (6.8L)
1987-93 ..................................... 7.6 Qts. (7.2L)
1994 (3.0L SOHC) ............................ 7.6 Qts. (7.2L)
1994 (3.0L DOHC & 3.5L) ..................... 9.0 Qts. (8.5L)
1995 ........................................ 7.9 Qts. (7.5L)
Cooling System
1983-88 ..................................... 8.5 Qts. (8.0L)
1989-95
2.6L ....................................... 9.7 Qts. (9.2L)
3.0L ...................................... 10.0 Qts. (9.5L)
1994

95
3.5L ...................................... 10.0 Qts. (9.5L)
Differential
1983-88 ..................................... 1.9 Qts. (1.8L)
1989-93
2.6L ....................................... 1.9 Qts. (1.8L)
3.0L ....................................... 2.7 Qts. (2.6L)
1994
3.0L & 3.5L ................................ 2.7 Qts. (2.6L)
1995
3.0L ....................................... 2.7 Qts. (2.6L)
3.5L ....................................... 3.3 Qts. (3.2L)
Engine Oil
1983-86 ..................................... 6.0 Qts. (5.8L)
1987 ........................................ 5.2 Qts. (5.0L)
1988 ........................................ 5.0 Qts. (4.8L)
1989-91 ..................................... 5.5 Qts. (5.3L)
1992-95 ..................................... 5.2 Qts. (4.9L)
Power Steering ................................ 1.1 Qts. (1.0L)
Fuel Tank
1983-88 .................................... 15.9 Gals. (60L)
1989-90
2.6L 2-Door ............................... 15.9 Gals. (60L)
3.0L 2-Door ............................... 19.9 Gals. (75L)
2.6L & 3.0L 4-Door .......................... 24 Gals. (92L)
1991-95 ...................................... 24 Gals. (92L)
Manual Transmission
1983-91 ..................................... 2.3 Qts. (2.2L)
1992 ........................................ 2.4 Qts. (2.3L)
1993-95 ..................................... 2.6 Qts. (2.5L)
Transfer Case
1983-91 ..................................... 2.3 Qts. (2.2L)
1992-95 ..................................... 2.4 Qts. (2.3L)
( 1) - Use of R12 in a R134a system will result in SEVERE DAMAGE.
( 2) - 1983 model equipped with manual transmission only.









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1.8L ............................................ 6.6 Qts. (6.2L)\
2.0L ............................................ 7.6 Qts. (7.2L)\
Galant ........................................... 7.6 Qts. (7.2L)\
Montero ......................................... 10.0 Qts. (9.5L)\
Pickup (2WD)
Automatic Transmission ......................... 6.4 Qts. (6.1L)\
Manual Transmission ............................ 6.3 Qts. (6.0L)\
Pickup (4WD) ..................................... 8.9 Qts. (8.4L\
)
Ram-50 (2WD)
Automatic Transmission ......................... 6.5 Qts. (6.1L)\
Manual Transmission ............................ 6.3 Qts. (6.0L)\
Ram-50 (4WD)
2.4L
Automatic Transmission ....................... 6.5 Qts. (6.1L)\
Manual Transmission .......................... 6.6 Qts. (6.2L)\
3.0L
Automatic Transmission ....................... 8.8 Qts. (8.3L)\
Manual Transmission .......................... 8.9 Qts. (8.4L)\
Stealth & 3000GT ................................. 8.8 Qts. (8.3L)\
Crankcase (Includes Filter)
Colt, Colt 200, Mirage & Summit .................. 4.2 Qts. (4.0L)\
Colt Vista ....................................... 4.0 Qts. (3.8L)\
Eclipse ...................................... (1) 4.5 Qts. (4.3L)
Galant
2.0L (SOHC) .................................... 4.0 Qts. (3.8L\
)
2.0L (DOHC) ................................ ( 1) 4.5 Qts. (4.3L)
Montero .......................................... 5.5 Qts. (5.3L)\
Pickup ........................................... 4.5 Qts. (4.3L)\
Ram-50 ........................................... 5.5 Qts. (5.3L)\
Stealth & 3000GT ............................. ( 1) 4.5 Qts. (4.3L)
Differential (SAE 80W-90/API GL-5)
Colt Vista (4WD), Eclipse ........................ 1.5 Pts. (.7L\
)
Galant, Stealth & 3000GT .......................... 1.5 Pts. (.7L)\
Montero
Front .......................................... 1.2 Qts. (1.1L)\
Rear ........................................... 2.7 Qts. (2.6L)\
Pickup & Ram-50
Front
2.4L ......................................... 1.6 Qts. (1.5L)\
3.0L ......................................... 2.7 Qts. (2.6L)\
Rear
2WD .......................................... 1.6 Qts. (1.5L)\
4WD
2.4L ....................................... 1.6 Qts. (1.5L)\
3.0L ....................................... 2.7 Qts. (2.6L)\
Manual Transaxle (SAE 75W-85/API GL-4)
Colt, Colt 200, Mirage & Summit
4-Speed ........................................ 3.6 Pts. (1.7L)\
5-Speed ........................................ 3.8 Pts. (1.8L)\
Colt Vista
2WD ............................................ 2.6 Qts. (2.5L)\
4WD ............................................ 2.2 Qts. (2.1L)\
Eclipse (FWD)
Except Turbo ................................... 1.9 Qts. (1.8L)\
Turbo .......................................... 2.3 Qts. (2.2L)\
Eclipse & Galant (AWD) ........................... 2.4 Qts. (2.3L\
)
Galant ........................................... 1.9 Qts. (1.8L)\
Stealth & 3000GT ................................. 2.4 Qts. (2.3L)\
Manual Transmission (SAE 75W-85/API GL-4)
Montero .......................................... 2.3 Qts. (2.2L)\
Pickup & Ram-50
2WD ............................................ 2.4 Qts. (2.3L)\
4WD ............................................ 2.3 Qts. (2.2L)\

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SU SPEN SIO N - F R O NT ( 4 W D)
1 991 M it s u bis h i M onte ro
1990-92 SUSPENSION
Front - 4WD Trucks
Chrysler Motors; Ram-50
Mitsubishi; Montero, Pickup
DESCRIPTION
The independent front suspension uses upper and lower control
arm and torsion bar construction. The components used with this system
are upper control arm, lower control arm, torsion bar, shock absorber,
stabilizer bar, steering knuckle, drive shaft and front differential.
See Fig. 1 .
Fig. 1: Replacing Upper Ball Joint (Montero)
Courtesy of Mitsubishi Motor Sales of America.
BALL JOINT CHECKING

1) Using Socket (MB990954) and torque wrench, rotate front
hub and tighten lock nut to 95-145 ft. lbs. (129-197 N.m) to seat
bearings. Loosen nut. Retighten nut to 18 ft. lbs. (24 N.m) and loosen\
30-40 degrees.
2) Using spring scale attached to wheel stud, measure and
record turning resistance required to rotate hub/rotor assembly before
installing locking hub.
3) Apply semi-drying sealant on locking hub assembly-to-
hub/rotor contact areas. DO NOT apply sealant on outer areas of
hub/rotor assembly, toward brake contact areas.
4) Align locking hub assembly key area with steering knuckle
keyway area. Loosely install locking hub assembly on hub/rotor
assembly. Ensure locking hub assembly fully contacts hub/rotor
assembly.
5) Install locking hub retaining bolts. Tighten to
specification. See TORQUE SPECIFICATIONS table at end of article.
Using spring scale attached to wheel stud, measure turning resistance
required to rotate hub/rotor assembly.
6) Subtract turning resistance measured in step 2) (before
installing locking hub) from turning resistance measured in step 5)
(after installing locking hub). If difference exceeds 3.1 lbs. (14 N)\
,
check for incorrect installation of locking hub assembly or
components.
7) Install shim and snap ring on drive axle. Rotate drive
axle until maximum end play is obtained. Using dial indicator, check
drive axle end play.
8) Drive axle end play should be .008-.020" (.20-.51 mm). If\
end play is not within specification, adjust drive axle end play by
changing axle shaft shim. Install new "O" ring and cover. Tighten
cover to specification. See TORQUE SPECIFICATIONS table at end of
article.
LOWER CONTROL ARM R & I
REMOVAL
1) Raise and support vehicle. Remove wheel assembly. Remove
front skid plate and undercover (if equipped). Remove torsion bar. See\
TORSION BAR under REMOVAL & INSTALLATION. Remove stabilizer bar bolt
from control arm.
2) Remove shock absorber-to-control arm bolts. Loosen but DO
NOT remove lower ball joint-to-steering knuckle nut. Using ball joint
fork, separate lower ball joint from steering knuckle.
3) Remove ball joint stud nut from steering knuckle. Remove
control arm shaft. See Fig. 1. Remove torque arm. Remove lower control
arm pivot bolt. Remove lower control arm.
INSPECTION
1) Inspect control arm for cracks or deformation. Check ball
joints. See BALL JOINT CHECKING under ADJUSTMENTS & INSPECTION.
2) Inspect ball joint dust covers for damage. Replace dust
covers if damaged. Inspect control arm bushing and frame bracket
bushing for damage. Replace if necessary.
3) If frame bracket bushing needs replacing, install Bushing
Remover/Installer (MB990958-01) in bushing. See Fig. 3. Tighten
bushing remover/installer bolt until bushing is removed. Reverse
bushing remover/installer to install bushing.
NOTE: Differential carrier may require relocation to replace left
bracket bushing.

TR AN SFE R C ASE

1991 M it s u bis h i M onte ro
1991-94 TRANSFER CASES
Mitsubishi
Dodge; Ram-50
Mitsubishi; Pickup, Montero
APPLICATION
TRANSFER CASE APPLICATIONS TABLE








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Application ( 1) Transmission Model
Dodge
1991-93 Ram-50 (2.4L) .......................... V5M21-1
1991-93 Ram-50 (3.0L M/T) ...................... V5MT1-2
1991-93 Ram-50 (3.0L A/T) ...................... V4AC1-2
Mitsubishi
1991-92 Pickup ................................. V5MT1-2
1991 Montero (M/T) ............................. V5MT1-2
1991 Montero (A/T) ............................. V4AW2-2
1992 Montero (M/T) ......................... ( 2) V5MT1-3
1992 Montero (A/T) ......................... ( 2) V4AW2-3
1993-94 Montero (M/T) ...................... ( 2) V5MT1-2
1993-94 Montero (A/T) ........................ ( 2) R4AC1
( 1) - Transfer case is indicated by a -2 or -3 following the
transmission model number.
( 2) - Transfer cases for Montero are identical for automatic and
manual transmission models.









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DESCRIPTION
Transfer case is a part-time, 2-speed unit with a 3-piece
aluminum case. Transfer case has a floor-mounted shifter and integral
speedometer gear. In Montero a Viscous Coupling Unit (VCU) and center
differential allows 2WD-to-4WD shifting at speeds under 62 MPH and
full-time 4WD operation.
WARNING: When battery is disconnected, vehicles equipped with
computers may lose memory data. When battery power is
restored, driveability problems may exist on some vehicles.
These vehicles may require a relearn procedure. See the
COMPUTER RELEARN PROCEDURES article in the GENERAL
INFORMATION section.
TESTING
4WD INDICATOR CONTROL UNIT (MONTERO)
The 4WD indicator control unit is located behind radio or CD
player. Remove 4WD indicator control unit and disconnect harness.
Backprobe harness connector and measure voltage between terminal No. 8
(ground) and each respective terminal. Compare test results with
chart. See Fig. 1.
DETECTION SWITCH

NOTE: With switch removed, check continuity between switch
connector terminal and switch body. With switch installed,
check continuity between switch connector terminal and
transfer case.
4WD Indicator Light Switch (RAM-50)
With switch removed, check continuity between connector
terminal and switch body. With switch end pressed, there should be no
continuity. With switch end released, there should be continuity.
Center Differential Lock Operation Detection Switch (Montero)
Check continuity between terminals at Brown wire connector
terminal on top of transfer case. With transfer control lever in "4H"
position, there should be no continuity. With transfer control lever
in "4HLc" position, there should be continuity. See Fig. 2.
4WD Operation Detection Switch (Montero)
Check continuity between terminals at Black wire connector
terminal on top of transfer case. With transfer control lever in "2H"
position, there should be no continuity. With transfer control lever
in "4H" position, there should be continuity. See Fig. 2.
Center Differential Lock Detection Switch (Montero)
Check continuity between terminals at Brown wire connector
terminal on side of transfer case. With transfer control lever in "4H"
position, there should be no continuity. With transfer control lever
in "4HLc" position, there should be continuity. See Fig. 2.
2WD-4WD Detection Switch (Montero)
Check continuity between terminals at Black wire connector
terminal on side of transfer case. With transfer control lever in "4H"
position, there should be no continuity. With transfer control lever
in "2H" position, there should be continuity. See Fig. 2.
HI/LO Detection Switch (Montero)
Check continuity between terminals at White wire connector
terminal on side of transfer case. With transfer control lever in "N"
(between "4HLc" and "4LLc") position, there should be no continuity.
With transfer control lever in "4HLc" position, there should be
continuity. With transfer control lever in "4LLc" position, there
should be continuity. See Fig. 2.

2) Remove 2 seal plugs. Remove 2 poppet springs and steel
balls. Shift transfer case to "4WD" and pull high-low shift rail out,
in rear cover direction. Remove interlock plunger. Remove pulse
generator (if equipped), front output shaft cover and pulse rotor (if\
equipped). Remove snap ring from rear bearing on output shaft. Remove
chain cover, oil guide and side cover. Remove countershaft locking
plate. Remove countershaft.
3) Remove countergear, 2 thrust washers, 2 needle bearings
and spacer through side cover opening. Remove snap ring, spring
retainers and spring from 2WD-4WD shift rail. Remove front output
shaft, rear output shaft and chain as assembly.
4) Remove 2WD-4WD shift fork and distance piece. Drive out
2WD-4WD shift rail spring pin. Remove 2WD-4WD shift rail and lug.
Remove high-low shift fork and high-low synchronizer sleeve. Remove
needle bearing and snap ring from input gear. Remove input gear
assembly.
5) If either control shaft or input gear oil seals are to be
replaced, drive out roll pin from transmission control change shifter.
Separate transfer case from adapter. See Fig. 3.
Disassembly (Montero)
1) Remove dynamic damper, 5 detection switches and 3 steel
balls. Remove poppet plug, spring and steel ball. Remove speedometer
gear assembly. Remove output shaft rear cover, spacers, dust seal
guard and oil seals. Front output shaft cover, wave spring and spacer
(if equipped).
2) Remove high-low shift rail plug and high-low shift fork
spring pin. Shift transfer case to "4WD". Remove rear cover and high-
low shift rail. Remove interlock plunger. Remove rear output shaft
(viscous coupling) assembly and center differential assembly. Remove
2WD-4WD synchronizer assembly, chain and front output shaft from
transmission as a unit. With White paint make match marks in grooves
of 2WD-4WD synchronizer in 3 places. With White paint make match marks
on spline projections of 2WD-4WD synchronizer sleeve in 3 places.
Refer to match marks during reassembly.
3) Remove snap ring, spring seat, spring, 2WD-4WD shift fork
and 2WD-4WD synchronizer sleeve. Remove differential lock hub, oil dam
cover and bearing retainer. Remove side cover and gasket. Remove
transfer counter gear shaft, transfer counter gear, thrust washer,
needle bearings and spacer. Remove transfer drive shaft assembly.
Remove high-low shift fork assembly and clutch sleeve. Remove transfer
input gear assembly.
4) Remove 2WD-4WD shift lug spring pin, spring, spring
retainer 2WD-4WD shift lug and shift rail. Remove input gear oil seal,
baffle plate, dust seal guard and front output shaft oil seal. See
Fig. 4 .
COMPONENT DISASSEMBLY & REASSEMBLY
OUTPUT SHAFT ASSEMBLY (MONTERO)
Disassembly & Reassembly (Rear Shaft)
Remove snap ring and press ball bearing off without putting
pressure on vicious coupling. Remove viscous coupling. To install,
reverse removal procedure. When installing new snap ring, select
thickest ring that will fit into groove. Acceptable clearance is 0-.
003" (0-.08 mm).
Disassembly & Reassembly (Front Shaft)
Remove front bearing. Remove rear bearing. To install reverse
removal procedure.

Disassembly & Reassembly
Remove snap ring, high-low synchronizer hub and low speed
gear. Remove bearing spacer, needle bearing and ball bearing. To
assemble, reverse disassembly procedure. Use thickest snap ring that
will fit into output shaft groove. Acceptable clearance is 0-.003" (0-
.08 mm). See Fig. 4.
INPUT SHAFT ASSEMBLY (RAM-50)
Disassembly & Reassembly
1) Remove snap ring from input shaft. Support bearing in
press. Press input shaft out to remove bearing.
2) On manual transmission models, remove spacer and snap ring
from below bearing. Remove cone spring and sub gear. See Fig. 6. For
reassembly, reverse disassembly procedures.
3) Press bearing into input shaft, pushing against inner
race. After fitting, ensure bearing rotates smoothly. Fit snap ring
over front end of input shaft. Snap rings are available in selective
thicknesses. Select thickest snap ring that will fit in groove.
Fig. 6: Exploded View Of Input Shaft Assembly (Ram-50 - Manual
Shown, Automatic Similar)
Courtesy of Mitsubishi Motor Sales of America.
CENTER DIFFERENTIAL CASE (MONTERO)

Disassembly & Reassembly
Separate center differential case front from rear case.
Remove pinion shaft, pinions, thrust washers and dowel pins. Inspect
for excessive wear and replace parts as needed. Align dowel pins and
match marks on outer case circumferences. Assemble front and rear
center differential cases. See the TORQUE SPECIFICATIONS table. Also,
see Fig. 7 .
Fig. 7: Exploded View Of Center Differential (Montero)
Courtesy of Mitsubishi Motor Sales of America.
2WD-4WD SYNCHRONIZER (MONTERO)

Fig. 10: Aligning Speedometer Sleeve
Courtesy of Mitsubishi Motor Sales of America.
Reassembly (Montero)
1) Install input gear and front output shaft oil seals into
transfer case housing. Install transfer input gear assembly baffle
plate and input gear seal. Pack grease between lips of seals and press
seal circumference uniformly.
2) Install 2WD-4WD shift lug into transfer case. Install
spring retainer and spring to shift rail and install into shift lug.
Press on shift rail to align spring pin holes in shift rail and shift
lug. While holding shift rail, tap spring pin into place with slit
facing center of shift rail.
3) Install transfer input gear assembly and snap ring. Select
thickest snap ring that will fit into groove. Allowed snap ring
clearance is 0-.0024" (0-.060 mm). Insert needle bearing onto transfer\
drive shaft assembly. Install high-low synchronizer sleeve and shift
fork assembly. Install transfer drive shaft assembly.
4) Install transfer countergear shaft thrust washers, needle
bearings, bearing spacer and transfer countergear. Install one thrust
washer at each end of transfer countergear. Ensure tab on thrust
washers fits into groove of transfer case. Install counter gear shaft
from transmission case side so lock plate groove is aligned with lock
plate. Install lock plate. Install side cover and gasket.
5) Install bearing retainer. If reusing bearing retainer
bolts, apply Locking Adhesive (3M 4170 Stud Lock) to threads. Install
oil dam cover. Install differential lock hub, snap ring, steel ball
and sleeve. Select thickest snap ring that will fit into groove.
Allowed snap ring clearance is 0-.003" (0-.08 mm). Install 2WD-4WD
synchronizer sleeve, 2WD-4WD shift fork, spring, spring seat and 2WD-