Transmission ISUZU TF SERIES 2004 Workshop Manual

7B1-58 MANUAL TRANSMISSION

3. WALKING OR JUMPING OUT OF GEAR

Checkpoint Trouble Cause Countermeasure

Shift rod and quadrant box
sliding faces
Detent ball
Replace the shift rod and/or
the quadrant box
Replace the detent ball
Worn shift rod and/or sliding
faces
Worn detent ball
Detent springRepair or replace the detent
spring
Replace the worn parts
Detent spring weak or broken
Insufficient stroke caused by
sliding position wear and
excessive play
OK
OKNG NG NG NG
OK OK
Change lever play
Continued on the next page
Mainshaft and countershaft
thrust playReplace the worn partsWorn thrust washer, collar,
and/or gear thrust faces
Replace the worn partsWorn shift arm and/or
synchronizer sleeve groove
NG NG
OKShift arm and synchronizer
sleeve

MANUAL TRANSMISSION 7B1-59

Checkpoint Trouble Cause Countermeasure

Synchronizer assembly
Bearings (Mainshaft,
countershaft, and individual
gears)
Replace the spring
Replace the bearing(s)
Weak or broken spring
Worn or broken bearings(s)
Mainshaft splines
Synchronizer clutch hub
splinesReplace the main shaft and
the synchronizer clutch hubWorn splines
OK
NG NG NG
OK OK
Continued from the previous page

7B1-60 MANUAL TRANSMISSION

4. OIL LEAKAGE

Checkpoint Trouble Cause Countermeasure

Gear oilReplace the gear oilImproper gear oil
Drain plug and/or filler plugTighten the plug(s) and
replenish the oil
Drain the oil to the correct
level
Loose plug(s)
Oil level too high
OKNG NG NG
OK OKOil level
Rear cover oil seal
Air breather
Replace the oil seal
Install the air breather
Replace the air breather
Worn or scratched oil seal
Air breather not installed
Air breather clogged
Front cover oil sealReplace the oil seal
Replace the gasket(s)
Worn or scratched oil seal
Defective or improperly
installed gasket(s)
OK
NG NG NG NG
OK OKGaskets

MANUAL TRANSMISSION 7B1-61

Special Tools (4





2)

ILLUSTRATION TOOL NO.
TOOL NAME ILLUSTRATION TOOL NO.
TOOL NAME
5-8840-2155-0
Bearing remover 5-8840-2159-0
Mainshaft end bearing
installer
5-8840-2027-0
Puller 5-8840-0015-0
Bearing
remover/installer
5-8840-2160-0
Holding fixture 5-8840-2797-0
Rear case oil seal
installer
5-8840-0003-0
Holding fixture base 5-8840-0026-0
Front cover oil seal
installer
5-8840-2156-0
Wrench 9-8522-1165-0
Mainshaft collar remover
5-8840-0047-0
Tork bit wrench
(T–45) 5-8840-0007-0
Driver handle

7B1-62 MANUAL TRANSMISSION

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, REFER
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, or
other corrosion inhibitors) on threaded fasteners or
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.

MANUAL TRANSMISSION 7B1-63

General Description
MUA Transmission (4




4)
A07R300003
The MUA is a constant mesh transmission,
synchronized in all speeds. The transmission is
designed for a great reduction of the shift effort and the
quietest possible operation.
Principle parts of the transmission are the integral clutch
housing, the intermediate plate, the rear case, and the
gears.
The transmission control box is built into the
transmission.

7B1-64 MANUAL TRANSMISSION

Transmission (4





4)
Disassembled View

RTW47BLF001001
Legend

(1) Gear Control Lever Knob (10) Transmission-Transfer Fixing Bolt
(2) Rear Floor Console (bucket) (11) Transfer Assembly
(3) Front Floor Console (12) Fuel Pipe Bracket
(4) Grommet Assembly (13) Slave Cylinder
(5) Gear Control Lever (14) Rear Mount Nut
(6) Rear Propeller Shaft (15) Transmission Crossmember
(7) Front Propeller Shaft (16) Starter (Diesel engine only)
(8) Exhaust Pipe Nut (Diesel engine) (17) Transmission Retaining Nut and Bolt
(9) Exhaust Pipe Assembly (6VE1) (18) Transmission Assembly

MANUAL TRANSMISSION 7B1-65

Removal
1. Disconnect battery ground cable.
2. Remove gear control lever knob (1).
3. Remove rear floor console (2). (Bucket seat)
Refer to the section “Floor Console”.
4. Remove front floor console (3).
Refer to the section “Floor Console”.
745R300006

Legend
(1) Knob
(2) Rear Floor Console
(3) Front Floor Console
5. Remove grommet assembly (4).



RTW47BMH000101

7B1-66 MANUAL TRANSMISSION

6. Remove gear control lever (5).
7. Raise and support vehicle with suitable stands.
8. Remove rear propeller shaft (6).
NOTE: Apply alignment marks on the flange at the
differential side.
9. Remove front propeller shaft (7).
NOTE: Apply alignment marks on the flange at both
front and rear sides.
401RS023
10. Loosen the front exhaust pipe fixing nuts (8) at the
engine side but not remove them. (Diesel engine
only)
150R300004
11. Remove the exhaust pipe (9). (6VE1 only)
RTW37ASH000101
12. Disconnect harness connectors and clips on the
transfer.


Actuator connector


Car Speed Sensor

810R300069

Legend
(1) Neutral Switch Connector: Transmission
(2) Back up Switch Connector
(3) Speed Sensor Connector
(4) Actuator Connector
(5) 2W - 4W Switch Connector
(6) Neutral Switch Connector: Transfer

MANUAL TRANSMISSION 7B1-67

13. Remove transmission-transfer fixing bolts (10), and
remove the transfer assembly (11) from the
transmission.
14. Disconnect harness connectors and clips on the
transmission.


Neutral switch; Transmission

Back up Switch

2W-4W Switch


Neutral Switch; Transfer
15. Remove the fuel pipe brackets (12) with pipes from
the transmission (18).
Diesel engine
220R300012

Legend
(1) Bolt
(2) Nut
(3) Fuel Pipe Assembly



6VE1, C24NE
Scan-2
16. Remove slave cylinder (13) and put aside it.
220LV019
17. Support transmission with a transmission jack.
220RS0001
18. Remove engine rear mount nuts (14) from
transmission crossmember (15).