HYDRAULIC SCHEMATIC – NEUTRAL

W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
Torque
Converter
Lube
Filter

CONVERTER IN Cooler
Conv
Regulator Lube Lube
CONVERTER OUT

APPENDIX H—HYDRAULIC SCHEMATICS

Overdrive Conv
Knockdown Flow
Lockup
Figure H–2. Hydraulic Schematic—Neutral
Copyright © 2005 General Motors Corp.

EX Lube
Regulator

F A B C D E
LU C1 C2 C3 C4 C5
N/C N/O N/O N/C N/C N/C EX

Main
Filter

Ctl.
G FWD Main
N/C Reg. Pressure Relief
ON–OFF

EX Main
Main EX
Exhaust (MD, B 300, and
C2 Backfill B 400 models only)
Main Pump
C4 C5 Regulator

C1
C1 C2 C3 C4 C5
Suction
Filter

Accumulator/
Relay Valve SOLENOIDS ENERGIZED A B E Sump
CLUTCH APPLIED C5
EFFECTIVE S/N:
C1 C3 MAIN COOLER/LUBE MD/B 300/B 400
Latch
CONTROL MAIN EX. BACKFILL S/N 6510024410
C3 Pressure EXHAUST CONVERTER HD/B 500
C2 EX ALL S/N
Switch SUCTION C5
Latch
H–3

V01129.04.01
 W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
HYDRAULIC SCHEMATIC – REVERSE
Torque
Converter
Lube
Filter

CONVERTER IN Cooler
Conv
Regulator Lube Lube
CONVERTER OUT

APPENDIX H—HYDRAULIC SCHEMATICS

Overdrive Conv
Knockdown Flow
Lockup
Figure H–3. Hydraulic Schematic—Reverse
Copyright © 2005 General Motors Corp.

EX Lube
Regulator

F LU A C1 B C2 C C3 D C4 E C5
N/C N/O N/O N/C N/C N/C EX

Main
Filter

Ctl.
G FWD Main
N/C Reg. Pressure Relief
ON–OFF

EX Main
Main EX
Exhaust (MD, B 300, and
C2 Backfill B 400 models only)
Main Pump
C4 C5 Regulator

C1
C1 C2 C3 C4 C5
Suction
Filter

Accumulator/
Relay Valve SOLENOIDS ENERGIZED A B C E Sump
CLUTCH APPLIED C3, C5
EFFECTIVE S/N:
C1 C3
Latch MAIN COOLER/LUBE C5 MD/B 300/B 400
CONTROL MAIN EX. BACKFILL S/N 6510024410
C3 Pressure EXHAUST CONVERTER HD/B 500
C2 EX ALL S/N
Switch SUCTION C3
Latch
H–5

V01130.04.01
 W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
HYDRAULIC SCHEMATIC – 1st RANGE
Torque
Converter
Lube
Filter

CONVERTER IN Cooler
Conv
Regulator Lube Lube
CONVERTER OUT

APPENDIX H—HYDRAULIC SCHEMATICS

Overdrive Conv
Knockdown Flow
Lockup
Figure H–4. Hydraulic Schematic—1st Range
Copyright © 2005 General Motors Corp.

EX Lube
Regulator

F LU A C1 B C2 C C3 D C4 E C5
N/C N/O N/O N/C N/C N/C EX

Main
Filter

Ctl.
G FWD Main
N/C Reg. Pressure Relief
ON–OFF

EX Main
Main EX
Exhaust (MD, B 300, and
C2 Backfill B 400 models only)
Main Pump
C4 C5 Regulator

C1
C1 C2 C3 C4 C5
Suction
Filter

Accumulator/ SOLENOIDS ENERGIZED B E G

Relay Valve Sump
CLUTCH APPLIED C1, C5
MAIN EX. BACKFILL EFFECTIVE S/N:
C1 C3 CONTROL MAIN CONVERTER MD/B 300/B 400
Latch
EXHAUST C1 S/N 6510024410
C3 Pressure EX SUCTION C5 HD/B 500
C2 Switch COOLER/LUBE FWD. KDN. ALL S/N
Latch
H–7

V01123.04.01
 W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
HYDRAULIC SCHEMATIC – 2nd RANGE
Torque
Converter
Lube
Filter

CONVERTER IN Cooler
Conv
Regulator Lube Lube
CONVERTER OUT

APPENDIX H—HYDRAULIC SCHEMATICS

Overdrive Conv
Knockdown Flow
Lockup
Figure H–5. Hydraulic Schematic—2nd Range
Copyright © 2005 General Motors Corp.

EX Lube
Regulator

F LU A C1 B C2 C C3 D C4 E C5
N/C N/O N/O N/C N/C N/C EX

Main
Filter

Ctl.
G FWD Main
N/C Reg. Pressure Relief
ON–OFF

EX Main
Main EX
Exhaust (MD, B 300, and
C2 Backfill B 400 models only)
Main Pump
C4 C5 Regulator

C1
C1 C2 C3 C4 C5
Suction
Filter

*SOLENOIDS ENERGIZED B D F G
Accumulator/ CLUTCH APPLIED C1, C4 LOCKUP
Relay Valve Sump
MAIN COOLER/LUBE LOCKUP
CONTROL MAIN EX. BACKFILL C1 EFFECTIVE S/N:
C1 C3 EXHAUST CONVERTER C4 MD/B 300/B 400
Latch
SUCTION FWD. KDN. S/N 6510024410
C3 Pressure HD/B 500
C2 EX * NOTE: During 1-2 Upshift and 2-1 Downshift, Solenoid G is ALL S/N
Switch de-energized (C2 Latch Valve “Up”, C1 Latch Valve “Down”)
Latch
to exhaust C5 Clutch through Solenoid E Regulator Valve. V01124.04.01
H–9
 W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
HYDRAULIC SCHEMATIC – 3rd RANGE
Torque
Converter
Lube
Filter

CONVERTER IN Cooler
Conv
Regulator Lube Lube
CONVERTER OUT

APPENDIX H—HYDRAULIC SCHEMATICS

Overdrive Conv
Knockdown Flow
Lockup
Figure H–6. Hydraulic Schematic—3rd Range
Copyright © 2005 General Motors Corp.

EX Lube
Regulator

F LU A C1 B C2 C C3 D C4 E C5
N/C N/O N/O N/C N/C N/C EX

Main
Filter

Ctl.
G FWD Main
N/C Reg. Pressure Relief
ON–OFF

EX Main
Main EX
Exhaust (MD, B 300, and
C2 Backfill B 400 models only)
Main Pump
C4 C5 Regulator

C1
C1 C2 C3 C4 C5
Suction
Filter

Accumulator/
Relay Valve SOLENOIDS ENERGIZED B C F G Sump
CLUTCH APPLIED C1, C3 LOCKUP
EFFECTIVE S/N:
C1 C3
Latch MAIN COOLER/LUBE LOCKUP MD/B 300/B 400
CONTROL MAIN EX. BACKFILL C1 S/N 6510024410
EXHAUST CONVERTER C3 HD/B 500
C3 Pressure EX
C2 SUCTION FWD. KDN. ALL S/N
Switch
Latch
H–11

V01125.04.01
 W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
HYDRAULIC SCHEMATIC – 4th RANGE
Torque
Converter
Lube
Filter

CONVERTER IN Cooler
Conv
Regulator Lube Lube
CONVERTER OUT

APPENDIX H—HYDRAULIC SCHEMATICS

Overdrive Conv
Knockdown Flow
Lockup
Figure H–7. Hydraulic Schematic—4th Range
Copyright © 2005 General Motors Corp.

EX Lube
Regulator

F LU A C1 B C2 C C3 D C4 E C5
N/C N/O N/O N/C N/C N/C EX

Main
Filter

Ctl.
G FWD Main
N/C Reg. Pressure Relief
ON–OFF

EX Main
Main EX
Exhaust (MD, B 300, and
C2 Backfill B 400 models only)
Main Pump
C4 C5 Regulator

C1
C1 C2 C3 C4 C5
Suction
Filter

Accumulator/
Relay Valve SOLENOIDS ENERGIZED F G Sump
CLUTCH APPLIED C1, C2 LOCKUP
EFFECTIVE S/N:
C1 C3
Latch MAIN COOLER/LUBE LOCKUP MD/B 300/B 400
CONTROL MAIN EX. BACKFILL C1 S/N 6510024410
C3 Pressure EXHAUST CONVERTER C2 HD/B 500
C2 EX ALL S/N
Switch SUCTION FWD. KDN.
Latch
H–13

V01126.04.01
 W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
HYDRAULIC SCHEMATIC – 5th RANGE
Torque
Converter
Lube
Filter

CONVERTER IN Cooler
Conv
Regulator Lube Lube
CONVERTER OUT

APPENDIX H—HYDRAULIC SCHEMATICS

Overdrive Conv
Knockdown Flow
Lockup
Figure H–8. Hydraulic Schematic—5th Range
Copyright © 2005 General Motors Corp.

EX Lube
Regulator

F LU A C1 B C2 C C3 D C4 E C5
N/C N/O N/O N/C N/C N/C EX

Main
Filter

Ctl.
G FWD Main
N/C Reg. Pressure Relief
ON–OFF

EX Main
Main EX
Exhaust (MD, B 300, and
C2 Backfill B 400 models only)
Main Pump
C4 C5 Regulator

C1
C1 C2 C3 C4 C5
Suction
Filter

Accumulator/
Relay Valve SOLENOIDS ENERGIZED A C F G Sump
CLUTCH APPLIED C2, C3 LOCKUP
EFFECTIVE S/N:
C1 C3
Latch MAIN COOLER/LUBE LOCKUP MD/B 300/B 400
CONTROL MAIN EX. BACKFILL C2 S/N 6510024410
C3 Pressure EXHAUST CONVERTER C3 HD/B 500
C2 EX
Switch SUCTION FWD. KDN. ALL S/N
Latch
H–15

V01127.04.01
 HYDRAULIC SCHEMATIC – 6th RANGE

W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
Torque
Converter
Lube
Filter

CONVERTER IN Cooler
Conv
Regulator Lube Lube
CONVERTER OUT

APPENDIX H—HYDRAULIC SCHEMATICS

Overdrive Conv
Knockdown Flow
Lockup
Figure H–9. Hydraulic Schematic—6th Range
Copyright © 2005 General Motors Corp.

EX Lube
Regulator

F LU A C1 B C2 C C3 D C4 E C5
N/C N/O N/O N/C N/C N/C EX

Main
Filter

Ctl.
G FWD Main
N/C Reg. Pressure Relief
ON–OFF

EX Main
Main EX
Exhaust (MD, B 300, and
C2 Backfill B 400 models only)
Main Pump
C4 C5 Regulator

C1
C1 C2 C3 C4 C5
Suction
Filter

*SOLENOIDS ENERGIZED A D F
Accumulator/ CLUTCH APPLIED C2, C4 LOCKUP Sump
Relay Valve
MAIN COOLER/LUBE LOCKUP
CONTROL MAIN EX. BACKFILL C2 EFFECTIVE S/N:
C1 C3 EXHAUST CONVERTER C4 MD/B 300/B 400
Latch SUCTION FWD. KDN. S/N 6510024410
C3 Pressure HD/B 500
C2 EX NOTE: During 5-6 shift, Solenoid G is energized
Switch (both Latch Valves “Down”) to exhaust C3 Clutch ALL S/N
Latch
H–17

through Solenoid C Regulator Valve.

V01128.04.01