Page 297 of 4264
FRONT WHEEL DRIVE 4C1-77
ITEM NO. ILLUSTRATION PART NO. PART NAME
FAL-58
5-8522-0054-0
(J-29015)
Inner bearing installer
(for 2WD)
FAL-54
5-8522-0051-0
(J-33161)
Hub oil seal installer
(for 2WD)
FAL-62
5-8840-2117-0
(J-36827)
Hub nut wrench
FAL-17
5-8840-2119-0
(J-36829)
Outer bearing inner race
installer (for 4WD)
FAL-19
5-8840-2120-0
(J-36830)
Oil seal installer (for 4WD)
FAL-18
5-8522-0054-0
(J-29015)
Outer bearing outer race
installer (for 4WD)
FAL-61
5-8840-2137-0
(J-38194)
Inner cam installer
FAL-39
5-8840-2126-0
Auto locking shim gauge
(for 4WD)
FAL-60
5-8840-2125-0
Snap ring installer
(for 4WD)
Page 298 of 4264
4C1-78 FRONT WHEEL DRIVE
ITEM NO. ILLUSTRATION PART NO. PART NAME
5-8840-2789-0
ABS sensor rotor installer
Page 299 of 4264

SHIFT ON THE FLY SYSTEM 4C2-1
DRIVELINE/AXLE
SHIFT ON THE FLY SYSTEM
CONTENTS
Service Precaution............................................. 4C2-1
Shift On The Fly System .................................... 4C2-2
Outline of Shift on The Fly System ................. 4C2-2
Shift On The Fly Electrical Equipment ............... 4C2-3
Axle Shaft Connection and Disconnection ..... 4C2-3
Actuator Assembly.......................................... 4C2-3
Shift On The Fly System and Association
Parts ................................................................. 4C2-4
Disassembly ................................................... 4C2-5
Inspection and Repair..................................... 4C2-6
Reassembly .................................................... 4C2-9
Torque Specifications ..................................... 4C2-12
Special Service Tool ....................................... 4C2-13
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE
SRS COMPONENTS OR THE SRS WIRING, REFE
R
TO THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM
REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, o
r
other corrosion inhibitors) on threaded fasteners o
r
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.
Page 300 of 4264
4C2-2 SHIFT ON THE FLY SYSTEM
Shift On The Fly System
Outline of Shift on The Fly System
The shift on the fly system switches between 2 wheel
drive (2WD) and 4 wheel drive (4WD) electrically b
y
driver's pressing the 4WD switch (push button type) on
instrument panel.
This system controls below operations.
1.
Shifting the transfer front output gear (Connecting to,
and disconnecting from, front propeller shaft b
y
motor actuator).
2. Retrial of shifting the transfer front output gear.
3. Connecting front wheels to, and disconnecting them
from, the front axles by axle motor actuator.
4. Indicator on instrument panel.
5. 4WD out signal to other Electronic Hydraulic Control
Unit.
System Diagrams
RUW34BLF000201
Page 301 of 4264
SHIFT ON THE FLY SYSTEM 4C2-3
Shift On The Fly Electrical Equipment
Axle Shaft Connection and Disconnection
RUW34BMF000101
Actuator Assembly
412RY00004
Page 302 of 4264
4C2-4 SHIFT ON THE FLY SYSTEM
Shift On The Fly System and Association Parts
RTW440LF000701
Disassembly steps
1. Filler plug
2. Bolt
3. Front axle drive shaft (LH side)
4. Bolt
5. Actuator assembly
6. Bolt
7. Housing
8. Sleeve
9. Clutch gear
10. Snap ring
11. Inner shaft
12. Snap ring
13. Inner shaft bearing
14. Needing bearing
15. Oil seal
Reassembly steps
To reassemble, follow the disassembly steps in
the reverse order.
Page 303 of 4264
SHIFT ON THE FLY SYSTEM 4C2-5
DISASSEMBLY
1. Filler Plug
Remove filler plug and packing and drain oil.
2. Bolt
Loosen mounting bracket fitting bolts and remove front axle
drive shaft from front axle case.
3. Front Axle Drive Shaft (LH side)
4. Bolt
Loosen actuator ASM fitting bolts.
5. Actuator Assembly
Draw out actuator ASM.
6. Bolt
Remove hosing fitting bolts.
7. Housing
8. Sleeve
9. Clutch Gear
412RW017
10. Snap Ring
Remove snap ring from front axle case by using a snap ring
pliers.
11.Inner Shaft
Take out inner shaft from front axle case.
412RW016
12.Snap Ring
Remove snap ring from inner shaft by using a snap ring
pliers.
412RW015
13.Inner Shaft Bearing
Remove inner shaft bearing by using a special tool and
press.
Remove : 5-8840-2197-0 (J-37452)
NOTE:
Be careful not to damage the shaft.
Page 304 of 4264

4C2-6 SHIFT ON THE FLY SYSTEM
412RS045
14.Needle Bearing
Remove needle bearing from inner shaft by using a special
tool.
Remover : 5-8840-0027-0 (J-26941)
Sliding hammer : 5-8840-0084-0 (J-2619-01)
NOTE:
Be careful not to damage the shaft.
15.Oil Seal
Remove oil seal from front axle case.
NOTE:
Be careful not to damage the front axle case.
Inspection and Repair
Inspect the removed parts. If there are abnormalities such as
wear and damage, take corrective action or replace.
Visual Check
Check and see if the inner shaft has such
abnormalities as wear and damage.
412RW014
412RS008
When inspecting the inner shaft, be sure to check and
see if its splined part is twisted, worn, or cracked. If so,
replace with a new shaft. In case such an abnormality
in its gear part (a slide with sleeve), replace the shaft.
412RS026
Inner Shaft Run-Out
With both end centers supported, rotate the shaft slowly
and measure deflection with a dial gauge.
Inner Shaft Run-Out (Limit) mm (in)
0.5 (0.02)
NOTE:
Do not heat the shaft to correct its bend.