Isuzu N-Series. Manual — part 941

Transmission Control System (Smoother) 7A-219

Special Tools and Equipment

Special Tools and Equipment

Illustration

Tool Number / Description /

Remarks

5-8840-2691-0/

Digital multimeter

Tech 2/

Scan tool

Automatic Transmission (Smoother) 7B-1

TRANSMISSION/TRANSAXLE

Automatic Transmission (Smoother)

Contents

Smoother Mechanism . . . . . . . . . . ... 7B-3

Description of Function and Operation . . . .. 7B-3
Part Location Diagram. . . . . . . . . ... 7B-6
Function Check:. . . . . . . . . . . . . 7B-7

Selector Lever Assembly . . . . . . . . . 7B-10

Components . . . . . . . . . . . . . 7B-10
Removal . . . . . . . . . . . . . . .. 7B-10
Installation . . . . . . . . . . . . . ... 7B-11

Selector Lever . . . . . . . . . . . . . . 7B-12

Components . . . . . . . . . . . . . 7B-12
Disassembly . . . . . . . . . . . . . 7B-12
Assembly . . . . . . . . . . . . . . . 7B-12

Vehicle Speed Sensor. . . . . . . . . . . 7B-13

Removal . . . . . . . . . . . . . . .. 7B-13
Installation . . . . . . . . . . . . . ... 7B-13

Gear Shift Position Sensor. . . . . . . . .. 7B-14

Removal . . . . . . . . . . . . . . .. 7B-14
Inspection . . . . . . . . . . . . . . 7B-14
Installation . . . . . . . . . . . . . ... 7B-14

Gear Select Position Sensor . . . . . . . ... 7B-16

Removal . . . . . . . . . . . . . . .. 7B-16
Inspection . . . . . . . . . . . . . . 7B-16
Installation . . . . . . . . . . . . . ... 7B-16

Neutral Switch . . . . . . . . . . . . . . 7B-18

Removal . . . . . . . . . . . . . . .. 7B-18
Inspection . . . . . . . . . . . . . . 7B-18
Installation . . . . . . . . . . . . . ... 7B-18

Reverse Switch . . . . . . . . . . . . ... 7B-19

Removal . . . . . . . . . . . . . . .. 7B-19
Inspection . . . . . . . . . . . . . . 7B-19
Installation . . . . . . . . . . . . . ... 7B-19

Input Shaft Speed Sensor . . . . . . . . ... 7B-20

Removal . . . . . . . . . . . . . . .. 7B-20
Inspection . . . . . . . . . . . . . . 7B-20
Installation . . . . . . . . . . . . . ... 7B-20

Turbine Speed Sensor . . . . . . . . . . 7B-21

Removal . . . . . . . . . . . . . . .. 7B-21
Inspection . . . . . . . . . . . . . . 7B-21
Installation . . . . . . . . . . . . . ... 7B-21

Transmission Fluid Cooler Circuit . . . . . ... 7B-22

Removal . . . . . . . . . . . . . . .. 7B-22
Installation . . . . . . . . . . . . . ... 7B-22

Flushing The Transmission Fluid Cooler Circuit . 7B-23

Inspection . . . . . . . . . . . . . . 7B-23

Smoother Transmission Assembly. . . . . .. 7B-24

Removal . . . . . . . . . . . . . . .. 7B-24
Installation . . . . . . . . . . . . . ... 7B-26
Tightening Torques. . . . . . . . . . .. 7B-29

Oil Filter . . . . . . . . . . . . . . . ...7B-30

Components. . . . . . . . . . . . . .7B-30
Removal. . . . . . . . . . . . . . ...7B-30
Installation. . . . . . . . . . . . . . 7B-30

Smoother . . . . . . . . . . . . . . . .7B-31

Components. . . . . . . . . . . . . .7B-31
Disassembly. . . . . . . . . . . . . .7B-32
Assembly . . . . . . . . . . . . . . .7B-35
Tightening Torques . . . . . . . . . . ..7B-39
Special Tools . . . . . . . . . . . . ...7B-40

Rear Oil Seal (5-Speed) . . . . . . . . . ..7B-41

Components. . . . . . . . . . . . . .7B-41
Removal. . . . . . . . . . . . . . ...7B-41
Installation. . . . . . . . . . . . . . 7B-42
Tightening Torques . . . . . . . . . . ..7B-43
Special Tools . . . . . . . . . . . . ...7B-44

Rear Oil Seal (6-Speed) . . . . . . . . . ..7B-45

Components. . . . . . . . . . . . . .7B-45
Removal. . . . . . . . . . . . . . ...7B-45
Installation. . . . . . . . . . . . . . 7B-46
Tightening Torques . . . . . . . . . . ..7B-47
Special Tools . . . . . . . . . . . . ...7B-48

MYY Transmission (5-Speed) . . . . . . . .7B-49

Components. . . . . . . . . . . . . .7B-49
Disassembly. . . . . . . . . . . . . .7B-51
Assembly . . . . . . . . . . . . . . .7B-55
Tightening Torques . . . . . . . . . . ..7B-66
Special Tools . . . . . . . . . . . . ...7B-67

MYY Transmission (6-Speed) . . . . . . . .7B-68

Components. . . . . . . . . . . . . .7B-68
Disassembly. . . . . . . . . . . . . .7B-70
Assembly . . . . . . . . . . . . . . .7B-76
Tightening Torques . . . . . . . . . . ..7B-88
Special Tools . . . . . . . . . . . . ...7B-89

Top Gear Shaft . . . . . . . . . . . . . 7B-90

Components. . . . . . . . . . . . . .7B-90
Disassembly. . . . . . . . . . . . . .7B-90
Assembly . . . . . . . . . . . . . . .7B-91
Special Tools . . . . . . . . . . . . ...7B-92

Main Shaft (5-Speed) . . . . . . . . . . ..7B-93

Components. . . . . . . . . . . . . .7B-93
Disassembly. . . . . . . . . . . . . .7B-94
Assembly . . . . . . . . . . . . . . .7B-97
Special Tools . . . . . . . . . . . . .7B-103

Main Shaft (6-Speed) . . . . . . . . . . 7B-104

Components. . . . . . . . . . . . ...7B-104
Disassembly. . . . . . . . . . . . ...7B-105
Assembly . . . . . . . . . . . . . ...7B-108
Special Tools . . . . . . . . . . . . .7B-114

7B-2 Automatic Transmission (Smoother)

Counter Shaft (5-Speed) . . . . . . . . ...7B-115

Components . . . . . . . . . . . . ..7B-115
Disassembly . . . . . . . . . . . . ..7B-115
Assembly . . . . . . . . . . . . . ...7B-116
Special Tools . . . . . . . . . . . . .7B-117

Counter Shaft (6-Speed) . . . . . . . . ...7B-118

Components . . . . . . . . . . . . ..7B-118
Disassembly . . . . . . . . . . . . ..7B-118
Assembly . . . . . . . . . . . . . ...7B-119
Special Tools . . . . . . . . . . . . .7B-120

Control Box . . . . . . . . . . . . . ...7B-121

Components . . . . . . . . . . . . ..7B-121
Disassembly . . . . . . . . . . . . ..7B-122
Assembly . . . . . . . . . . . . . ...7B-124
Specifications . . . . . . . . . . . . 7B-127
Tightening Torques. . . . . . . . . . 7B-128
Special Tools . . . . . . . . . . . . .7B-129

Automatic Transmission (Smoother) 7B-3

Smoother Mechanism

Description of Function and Operation

Smoother

N7A1001E