Isuzu N-Series. Service manual — part 948
7B-28 Automatic Transmission (Smoother)
10. Install the parking brake cable clip on the gearshift
control box.
11. Connect the neutral switch connector, and install
the battery cable clip.
12. Install the connector bracket.
a. Install the frame harness clip on the connector
bracket, and install the connector bracket on
the transmission.
b. Install the reverse switch connector on the
connector bracket.
13. Connect the two transmission harness connectors
to the frame harness.
a. Connect the two transmission harness
connectors to the frame harness.
b. Install one transmission harness clip and two
frame harness clips on the connector bracket.
c. Install the transmission harness connectors at
two points on the connector bracket, and install
the connector bracket nut.
14. Connect the speed sensor connector.
15. Install the starter motor assembly.
Tighten:
76 N
⋅m (7.7 kg⋅m / 56.1 lb⋅ft)
16. Install the upper oil filler tube. (Use a new O-ring.)
Tighten:
41 N
⋅m (4.2 kg⋅m / 30.2 lb⋅ft)
17. Install the starter ground cable.
Tighten:
39 N
⋅m (4.0 kg⋅m / 28.8 lb⋅ft)
18. Install the two starter harnesses.
19. Install the parking brake cable.
• Refer to “Parking Brake.”
20. Install the rear propeller shaft.
• Refer to “Rear Drive Propeller Shaft”.
21. Install the propeller shaft guard.
22. Apply engine oil to the O-ring, and then install the
transmission drain plug and the O-ring (after
disassembly).
Tighten:
39 N
⋅m (4.0 kg⋅m / 28.8 lb⋅ft)
23. Apply oil (Besco ATF III) to the O-ring, and then
install the Smoother oil pan drain plug and the O-
ring (after disassembly).
Tighten:
40 N
⋅m (4.1 kg⋅m / 29.5 lb⋅ft)
24. Supply transmission fluid (Besco ATF III) from the
oil filler tube to the Smoother (after disassembly).
N7A1032E
N7A1030E
Legend
1. Transmission Harness Connector
2. Frame Harness Clips
3. Connector Bracket Nut
4. Connector Bracket
N7A1287E
Automatic Transmission (Smoother) 7B-29
25. Fill transmission oil (5W-30) from the filler hole
(after disassembly).
26. Apply engine oil to the O-ring, and then install the
transmission filler plug and the O-ring (after
disassembly).
Tighten:
39 N
⋅m (4.0 kg⋅m / 28.8 lb⋅ft)
27. Install the transmission side cover and bracket.
28. Connect the battery (
−) cable.
29. If you replaced switches, etc., perform gear shift
position learning and half-clutch position learning.
• For the learning procedure, refer to
“Transmission Control System Smoother.”
30. Start the engine and use the level gauge to check
the transmission fluid level.
Tightening Torques
N7A1048E
7B-30 Automatic Transmission (Smoother)
Oil Filter
Components
Removal
1. Remove the bolt, and then remove the filler tube
and O-ring.
2. Remove the bolt and remove the cover and
gascket. (Removal is not required if the filter is
replaced.)
3. Remove the drain plug and remove the O-ring.
4. Remove the 13 bolts, and remove the oil pan and
lower gasket.
5. Remove the one bolt, and remove the strainer
cover, upper gasket, and oil filter.
6. If the filter is clogged, dirty, or otherwise abnormal,
replace it.
When re-assembling, clean and then assemble.
Installation
1. Apply oil (Besco ATF III) to the bottom of the clutch
housing (except the oil pan installation surface).
2. Insert the oil filter in the clutch housing, install a
new upper gasket, and then use the installation
bolt to install the strainer cover.
Tighten:
10 N
⋅m (1.0 kg⋅m / 7.4 lb⋅ft)
• Position the tab of the upper gasket as shown
in the illustration, and take care that the top-
bottom orientation is correct.
3. Install the oil pan with a new lower gasket, and
tighten with the installation bolts. Check the
tightening torque twice.
Tighten:
10 N
⋅m (1.0 kg⋅m / 7.4 lb⋅ft)
• Position the tab of the lower gasket as shown in
the illustration, and take care that the top-
bottom orientation is correct.
4. Apply oil (Besco ATF III) to the O-ring, assemble
the drain plug, and tighten it.
Tighten:
40 N
⋅m (4.1 kg⋅m / 29.5 lb⋅ft)
5. Insert a new gasket, and tighten the cover with the
bolt.
Tighten:
10 N
⋅m (1.0 kg⋅m / 7.4 lb⋅ft)
Legend
1. Bolt
2. Cover
3. Gasket
4. Oil Filter
5. Upper Gasket
6. Strainer Cover
7. Lower Gasket
8. Drain Plug
9. O-ring
10. Oil Pan
11. Bolt
12. Bolt
13. Gasket Tab
N7A1049E
Automatic Transmission (Smoother) 7B-31
Smoother
Components
Caution:
• The interior of the Smoother does not stand up to
dust, so be sure to clean all components before
assembly. In addition, never use cloth rags, knit
gloves, or air tools during assembly. Do not apply
any paint, etc.
• In the case of disassembly, re-assemble using new
O-rings, D-rings, and seal rings.
Legend
1. Fluid Coupling
7. Input Shaft Speed Sensor
2. Oil Pump Assembly
8. Cover
3. Clutch Assembly
9. Oil Pan Assembly
4. Brake Band
10. Oil Filler Tube Assembly
5. Clutch Housing
11. Turbine Speed Sensor
6. Top Gear Shaft
12. Plunger and Piston Assembly
N7A1050E
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