1999 MITSUBISHI LANCER EVOLUTION VI transmission

MANUAL TRANSMISSION OVERHAUL – General22B-2
GENERAL
OUTLINE OF CHANGE
Of the newly introduced transmission model, the service procedures for the following unit sections are
described.

Transmission

Clutch housing

Reverse idler gear

MANUAL TRANSMISSION OVERHAUL – Specifications22B-3
SPECIFICATIONS
TRANSMISSION MODEL TABLE

Transmission modelGear ratioSpeedometer gear ratioFinal gear ratioFront LSD
W5M51-1-X6AA29/364.529Not available
W5M51-1-X6A1A29/364.529Available
W5M51-1-X7AA30/364.529Not available
W5M51-1-X7A1A30/364.529Available
W5M51-1-Z6AB29/364.875Not available
W5M51-1-Z6A1B29/364.875Available
W5M51-1-Z7AB30/364.875Not available
W5M51-1-Z7A1B30/364.875Available
W5M51-1-X6A2B29/364.529Not available
W5M51-1-X6A3B29/364.529Available
W5M51-1-X7A2B30/364.529Not available
W5M51-1-X7A3B30/364.529Available

Transmission modelGear ratioSpeedometer gear ratioFinal gear ratioFront LSD
W5M51-2-X6AA29/364.529Not available
W5M51-2-X6A1A29/364.529Available
W5M51-2-Z6AB29/364.875Not available
W5M51-2-X6A2B29/364.529Not available
W5M51-2-Z6A1B29/364.875Available
W5M51-2-X6A3B29/364.529Available

Transmission modelGear ratioSpeedometer gear ratioFinal gear ratioFront LSD
W5M51-2-X6A4A29/364.529Not available
W5M51-2-X6A6B29/364.529Not available
W5M51-2-Z6AB29/364.875Not available
W5M51-2-X6A8A29/364.529Available
W5M51-2-Z6A7B29/364.529Available
W5M51-2-X6A1B29/364.875Available

MANUAL TRANSMISSION OVERHAUL – Transmission22B-4
TRANSMISSION
DISASSEMBLY AND REASSEMBLY
1 2 34 5
6
78
910
11
18 Nm
69 Nm69 Nm 18 Nm
69 Nm
3.9 Nm32 Nm32 Nm
3
Disassembly steps
1. Transfer
J2. O-ring
3. Roll stopper bracket
4. Insulator washer
(EVOLUTION-IV only)
5. Shift cable bracketI6. Select lever
H7. Speedometer gear
8. Back-up lamp switch
9. Gasket
10. Plug
11. Gasket
NOTE:
For each service point, refer to Basic Manual. (Pub. No. S9806CNCP9)

MANUAL TRANSMISSION OVERHAUL – Clutch Housing22B-5
CLUTCH HOUSING
DISASSEMBLY AND REASSEMBLY
4
2
1
3
8 6 7
5*
9.8 Nm
Disassembly steps
1. Clutch release bearing retainer
E2. Oil seal
AD3. Outer race
BC4. Outer raceB5. Bushing*
A6. Cover-A
A7. Cover-B
8. Clutch housing
NOTE:
(1)*: Never remove the bushings from the clutch housing.
Only the case when installing new bushings into a new clutch housing, refer to B.
(2) For each service point, refer to Basic Manual. (Pub. No. S9806CNCP9)

MANUAL TRANSMISSION OVERHAUL – Reverse Idler Gear22B-6
REVERSE IDLER GEAR
DISASSEMBLY AND REASSEMBLY
Apply gear oil to all
moving parts before
installation.
5
4321
6
7
Disassembly steps
1. Snap ring
2. Cone spring
(except EVOLUTION-IV)
3. Thrust washer
4. Steel ball
(except EVOLUTION-IV)
5. Reverse idler gear
6. Needle roller bearing
7. Reverse idler gear shaft
INSPECTION
NEEDLE ROLLER BEARING
(1) Check to ensure that when the shaft and gear are combined
and made to rotate, they rotate smoothly without looseness
and noise.
(2) Check to ensure that the cage is not deformed.

REAR AXLE – On-vehicle Service REAR AXLE – On-vehicle Service 27-34
BLEEDING
1. Lift up the vehicle.
2. Connect the MUT-II to the 16-pin diagnosis connector.
Caution
Before connecting or disconnecting the MUT-II,
always turn off the ignition switch.
3. Turn on the ignition switch.
4. Operate the MUT-II (Item No.10) to activate the hydraulic
unit forcibly.
NOTE
(1) The forced activation (air bleeding mode) will be
automatically canceled after 5 minutes operation. It
can also be canceled forcibly by operating the clear
key on the MUT-II.
(2) While this function is being disabled by the fail-safe
function, the forced activation of the hydraulic unit
can not be executed.
5. Remove the cap of the left bleeder screw on the torque
transfer differential and connect a vinyl hose.
6. Gradually turn the steering wheel clockwise from the
straight-ahead position. At this time, loosen the left bleeder
screw and check that fluid is discharged with air.
7. After air has been completely discharged, tighten the
bleeder screw.
Caution
While the system is being bled of air, add fluid as
necessary to ensure that it is left in the oil reservoir
during the entire procedure.
8. Repeat steps (6) and (7) two to three times until no air
bubbles are recognized in the fluid that comes out. Then,
tighten the bleeder screw to the specified torque.
Tightening torque: 9 Nm
9. Perform steps (5) through (8) for the right bleeder screw.
Note, however, that the steering wheel should be turned
counterclockwise.
10. After the system has been completely bled of air, check
for the fluid level. (Refer to P.27-33.)
Caution
If the system is not completely bled of air, the hydraulic
unit could generate noise, degrading pump durability.
AYC OPERATION CHECK
1. Lift up the vehicle.
2. Connect the MUT-II to the 16-pin diagnosis connector.
Caution
Before connecting or disconnecting the MUT-II, always
turn off the ignition switch.
3. Start the engine.
4. Operate the MUT-II with the transmission in 2nd or a
higher gear and check to ensure that the vehicle speed
is higher than 10 km/h using the Data List (Item 10).
Bleeder
screws Vinyl hose

REAR AXLE – On-vehicle Service 27-35
NOTE
(1) Hold the steering wheel in the neutral position.
(2) If the steering wheel is turned, it may happen that
the AYC system continues to operate (operation
sounds are heard from the torque transfer differential).
However, it does not mean a system failure. If such
a case is encountered, perform the following
operations with the steering wheel in the neutral
position to cancel the AYC function.

Disengage the clutch.

Set the transmission to neutral.

Stop the engine.
5. Operate the MUT-II (Item Nos.13 and 14) to activate
the torque transfer differential.
NOTE
(1) The forced activation (clutch operation mode) will be
automatically canceled after 1 minute operation.
It can also be canceled forcibly by operating the clear
key on the MUT-II.
(2) While this function is being disabled by the fail-safe
function, the forced activation of the torque transfer
differential can not be executed.
6. Operate the MUT-II to confirm that the several speeds
of the wheels are as shown below, using the Data List
(Item Nos.07 and 08).

The speed of left rear wheel is more than 2 km/h
higher than that of right rear wheel.

The speed of right rear wheel is more than 2 km/h
higher than that of left rear wheel.
NOTE
If the above requirements are not satisfied, the system
is probably failed. Check the hydraulic pressure.
HYDRAULIC PRESSURE CHECK
1. Lift up the vehicle.
2. Connect the MUT-II to the 16-pin diagnosis connector.
Caution
Before connecting or disconnecting the MUT-II,
always turn off the ignition switch.
3. Turn on the ignition switch.
4. Disconnect the joint between the hydraulic unit and the
hydraulic unit hose assembly. Connect the special tool
to the L port. To the R port, attach a blind plug or connect
the L port of the removed hydraulic unit hose assembly.
5. Operate the MUT-II (Item No.13) to activate the hydraulic
unit.
NOTE
(1) The forced activation (clutch left side operation check
mode) will be automatically canceled after 1 minute
operation.
It can also be canceled forcibly by operating the clear
key on the MUT-II.
MB991705
MD998330

STEERING – Power Steering Gear Box37A-9
Lubrication and Sealing Points
Fluid:
Automatic
transmission
fluid DEXRON
or DEXRON II
Grease: Repair kit grease
Fluid:
Automatic transmission fluid
DEXRON or DEXRON II
Fluid:
Automatic transmission fluid
DEXRON or DEXRON II
Fluid:
Automatic transmission fluid
DEXRON or DEXRON II
Fluid:
Automatic transmission fluid
DEXRON or DEXRON II
Grease: Repair kit grease
Sealant:
3M ATD Part No. 8661 or
equivalent
Fluid:
Automatic transmission fluid
DEXRON or DEXRON II
Grease: Silicone grease
Fluid:
Automatic transmission fluid
DEXRON or DEXRON II