1998 MITSUBISHI LANCER EVOLUTION IV differential

Torque Specifications /
Special toolsMANUAL TRANSMISSION OVERHAUL – 22B-10
TRANSFER
ItemsNm {kgf
m}
Transfer cover mounting bolt23 {2.4}
Transmission-transfer mounting bolt69 {7.0}
SPECIAL TOOLS
ToolNumberNameUse
MB990887Arm bushing
remover & installer
ringInstallation of transfer oil seal
MB990891Bushing remover &
installer baseInstallation of transfer oil seal
MB990928Installer adapterInstallation of input shaft oil seal
MB990932Installer adapterRemoval of differential case taper roller bearing
MB990933Installer adapterInstallation of transfer oil seal
MB990935Installer adapterInstallation of output shaft front taper roller
bearing outer race
MB990937Installer adapterInstallation of differential case taper roller
bearing

MANUAL TRANSMISSION OVERHAUL – Special Tools22B-11
Tool UseName Number
MB990938HandleUse with Installer adapter
MB991445Bushing remover
and installer baseInstallation of differential case taper roller
bearing outer race
MD998304Oil seal installerInstallation of transfer extension housing oil
seal
MD998364Camshaft oil seal
installerInstallation of gear, bearing and sleeve
MD998800Oil seal installerInstallation of differential oil seal and transfer
cover oil seal
MD998801Bearing removerInstallation and removal of gear, bearing and
sleeve
MD998812Installer capUse with Installer and installer adapter
MD998813Installer-100Use with Installer cap and installer adapter
MD998814Installer-200Use with Installer cap and installer adapter

MANUAL TRANSMISSION OVERHAUL – Transmission22B-15
Apply gear oil to all
moving parts before
installation.
2829
3031
32
3334
3536 37
38
39 40
Disassembly steps

C28. Spring pin
29. 1st-2nd speed shift rail
30. 1st-2nd speed shift fork

C31. Spring pin
A

C32. Spring pin
B

B33. 3rd-4th speed shift rail
B

B34. 3rd-4th speed shift forkB

B35. 5th-reverse speed shift rail
B

B36. 5th-reverse speed shift fork
C

A37. Center differential
C

A38. Output shaft
C

A39. Input shaft
40. Clutch housing

MANUAL TRANSMISSION OVERHAUL – Transmission22B-16
DISASSEMBLY SERVICE POINTS
A
SPRING PIN REMOVAL
Shift the 5th-reverse shift fork in the direction shown in the
illustration.
B
3RD-4TH SPEED SHIFT RAIL / 3RD-4TH SPEED
SHIFT FORK / 5TH-REVERSE SPEED SHIFT
RAIL / 5TH-REVERSE SPEED SHIFT FORK
REMOVAL
Pull out the shift rails from the shift rail holes in the clutch
housing.
C
CENTER DIFFERENTIAL / OUTPUT SHAFT /
INPUT SHAFT REMOVAL
Remove the input shaft, output shaft and center differential
together.
ADJUSTMENT BEFORE REASSEMBLY
SPACER SELECTION FOR ADJUSTING INPUT SHAFT
END PLAY / OUTPUT SHAFT PRELOAD /
DIFFERENTIAL PRELOAD
(1) Install the input shaft, output shaft and center differential
as a set to the clutch housing.
(2) Place two pieces of solder (1.6 mm in diameter and approx.
10 mm in length) on the input shaft rear bearing at the
positions shown in the illustration.
5th-reverse
shift fork
5th-reverse
shift rail3rd-4th
speed
shift rail
Output shaft
Center
differentialInput
shaft
Output shaft
Center
differentialInput
shaft
Solders

MANUAL TRANSMISSION OVERHAUL – Transmission22B-17
(3) Place two pieces of solder (1.6 mm in diameter and approx.
10 mm in length) on the transmission case at the positions
shown in the illustration.
(4) Install the bearing outer race.
(5) Install the transmission case and tighten the bolts to the
specified torque.
(6) Remove the transmission case. If the solder is not crushed,
repeat the steps (2) through (5) using the solder with
larger diameter.
(7) Measure the thickness of the crushed solder with a
micrometer and select spacers that will provide the
standard end play/preload value.
Standard value:
Input shaft end play 0 – 0.17 mm . . . . . . . . . .
Output shaft end play 0.13 – 0.18 mm . . . . . . . .
Center differential preload 0.05 – 0.11 mm . . . .
REASSEMBLY SERVICE POINTS

AINPUT SHAFT / OUTPUT SHAFT / CENTER
DIFFERENTIAL INSTALLATION
Install the input shaft, output shaft and differential as a unit.

B5TH-REVERSE SPEED SHIFT FORK /
5TH-REVERSE SPEED SHIFT RAIL / 3RD-4TH
SPEED SHIFT FORK / 3RD-4TH SPEED SHIFT
RAIL INSTALLATION
(1) Install the 3rd-4th speed shift rails and fork, and
5th-reverse speed shift rail and fork.
Solders
Solders
Output shaft
Center
differentialInput
shaft
3rd-4th speed
shift fork
5th-reverse
speed shift fork5th-reverse
speed shift rail
3rd-4th speed
shift rail

MANUAL TRANSMISSION OVERHAUL – Center Differential22B-46
CENTER DIFFERENTIAL
DISASSEMBLY AND REASSEMBLY
5
43
21
6
1516177
8
910
11
12 13 14 121112
9
12
Apply gear oil to all
moving parts before
installation.
132 {13.5}
Unit: Nm {kgf
m}
Disassembly steps

D1. Center differential drive gear

C2. Center differential flange
A

B3. Taper roller bearing

C4. Snap ring

C5. Front output shaft

C6. Spacer

C7. Side gear

C8. Lock pin

C9. Pinion shaft
C10. Pinion shaft holder

C11. Pinion

C12. Washer

C13. Side gear

C14. Spacer
B

A15. Taper roller bearing
16. Speedometer drive gear
17. Differential case
DISASSEMBLY SERVICE POINTS
A
TAPER ROLLER BEARING REMOVAL
Use the special tool to remove the taper roller bearing.MD998917

MANUAL TRANSMISSION OVERHAUL – Center Differential22B-47
B
TAPER ROLLER BEARING REMOVAL
Use the special tools to remove the taper roller bearing.
REASSEMBLY SERVICE POINTS

ATAPER ROLLER BEARING INSTALLATION
Use the special tool to install the taper roller bearing.

BTAPER ROLLER BEARING INSTALLATION
Use the special tools to install the taper roller bearing.

CSPACER / SIDE GEAR / WASHER /
PINION/PINION HOLDER / PINION SHAFT /
LOCK PIN / FRONT OUTPUT SHAFT / SNAP
RING / CENTER DIFFERENTIAL FLANGE
INSTALLATION
(1) Install the side gear in the center differential case with
the spacer attached.
NOTE
If a new side gear is to be installed, select a spacer
with medium thickness (0.8 – 0.9 mm).
(2) Fit the washer on the back of each pinion. Engage the
4 pinions simultaneously in the side gear.
Rotate the gears to place them in position, then install
the pinion shaft holder.
(3) Insert the pinion shafts.
(4) Install the lock pins in the illustrated direction.
MD998917
MB990932
MB990937
MD998812
MD998823
Lock pin Differential case
Pinion shaft

MANUAL TRANSMISSION OVERHAUL – Center Differential22B-48
(5) Install the front output shaft to the side gear and fit the
snap ring.
(6) Attach the spacer on the other side gear, then install
the side gear in the center differential case.
NOTE
If a new side gear is to be installed, select a spacer
with medium thickness (0.8 – 0.9 mm).
(7) Install the center differential flange on the case while
aligning the mating marks, then secure it temporarily with
machine screw.
(8) Measure the backlash between the side gear and the
pinion.
Standard value: 0.025 – 0.150 mm
(9) If the measurement deviates from the standard value,
correct the backlash using a spacer of different thickness
and check it again.
NOTE
The backlash must be the same on both sides.

DCENTER DIFFERENTIAL DRIVE GEAR
INSTALLATION
(1) Apply sealant to the entire threaded portion of the bolt.
Specified sealant:
THREEBOND 1303 or LOKTITE 648
(2) Tighten the bolts to the specified torque in the illustrated
sequence.
1
8
7
6
5
4
3
2
10
9