Lincoln Navigator: Automatic Transmission - 10-Speed Automatic Transmission – 10R80 / B Clutch. Diagnosis and Testing
Symptom Chart
B Clutch
For B clutch operation,
REFER to: B Clutch (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Description and Operation).
B Clutch
| Condition | Possible Sources | Action |
| B clutch does not apply | SSB mechanically stuck OFF |
INSTALL a new solenoid. REFER to: Shift Solenoids (SS) (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
| B clutch control valve stuck OFF |
DISASSEMBLE, CLEAN and INSPECT the B clutch
control valve. If the bore or valve is damaged, INSTALL a new main
control valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch latch valve stuck OFF |
DISASSEMBLE, CLEAN and INSPECT the B clutch
latch valve. If the bore or valve is damaged, INSTALL a new main control
valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch hydraulic circuit blocked/leaking |
DISASSEMBLE and INSPECT the main control
valve body and separator plate passages for debris, blockage and leaks.
CLEAN as necessary. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
|
CARRY OUT the air pressure test on the B clutch. REFER to: Special Testing Procedures (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Diagnosis and Testing). If a leak is detected, INSPECT the front support assembly and B clutch piston seals for leaks. INSTALL new components as necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
||
| Front support assembly, sun gear no. 1 |
DISASSEMBLE and INSPECT the front support
assembly hydraulic passages for debris, blockage and leaks. INSPECT the
front support assembly and sun gear no. 1 for wear and damage. CLEAN or
INSTALL new components as necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch piston seals |
DISASSEMBLE and INSPECT the B clutch piston
seals for wear and damage. INSTALL new components as necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch friction plates |
DISASSEMBLE and INSPECT the B clutch
friction and steel plates for wear and damage. INSTALL new components as
necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch always applied | SSB mechanically stuck ON |
INSTALL a new solenoid. REFER to: Shift Solenoids (SS) (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
| B clutch control valve stuck ON |
DISASSEMBLE, CLEAN and INSPECT the B clutch
control valve. If the bore or valve is damaged, INSTALL a new main
control valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch latch valve stuck ON |
DISASSEMBLE, CLEAN and INSPECT the B clutch
latch valve. If the bore or valve is damaged, INSTALL a new main control
valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch hydraulic circuit cross leaks |
DISASSEMBLE and INSPECT the main control
valve body and separator plate passages for cracks, warping and damage.
If damage is found, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| Front support assembly, sun gear no. 1 |
DISASSEMBLE and INSPECT the components for wear and damage. INSTALL new components necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch separating springs |
DISASSEMBLE and INSPECT the B clutch
separating springs for damage. INSTALL new components as necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch friction plates |
DISASSEMBLE and INSPECT the B clutch
friction and steel plates for wear and damage. INSTALL new components as
necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch delayed/soft/slipping apply | Incorrect transmission strategy programmed into PCM / TCM . |
CARRY OUT the Transmission Strategy Download and the Adaptive Learning Drive Cycle. REFER to: Transmission Strategy Download (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, General Procedures). REFER to: Adaptive Learning Drive Cycle (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, General Procedures). |
| Low line pressure |
CARRY OUT the line pressure test. If line
pressure is low, REFER to the Line Pressure Diagnosis Chart. REFER to: Special Testing Procedures (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Diagnosis and Testing). |
|
| SSB mechanically sticking |
INSTALL a new solenoid. REFER to: Shift Solenoids (SS) (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch control valve sticking |
DISASSEMBLE, CLEAN and INSPECT the B clutch
control valve. If the bore or valve is damaged, INSTALL a new main
control valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch latch valve sticking |
DISASSEMBLE, CLEAN and INSPECT the B clutch
latch valve. If the bore or valve is damaged, INSTALL a new main control
valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch hydraulic circuits blocked/leaking |
DISASSEMBLE and INSPECT the main control
valve body and separator plate passages for debris, blockage and leaks.
CLEAN as necessary. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
|
CARRY OUT the air pressure test on the B clutch. REFER to: Special Testing Procedures (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Diagnosis and Testing). If a leak is detected, INSPECT the front support assembly and B clutch piston seals for leaks. INSTALL new components as necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
||
| B clutch piston seals |
DISASSEMBLE and INSPECT the B clutch piston
seals for wear and damage. INSTALL new components as necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch friction plates |
DISASSEMBLE and INSPECT the B clutch
friction and steel plates for wear and damage. INSTALL new components as
necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch harsh apply | Incorrect transmission strategy programmed into PCM / TCM . |
CARRY OUT the Transmission Strategy Download and the Adaptive Learning Drive Cycle. REFER to: Transmission Strategy Download (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, General Procedures). REFER to: Adaptive Learning Drive Cycle (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, General Procedures). |
| High line pressure |
CARRY OUT the line pressure test. If line
pressure is high, REFER to the Line Pressure Diagnosis Chart. REFER to: Special Testing Procedures (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Diagnosis and Testing). |
|
| SSB mechanically sticking |
INSTALL a new solenoid. REFER to: Shift Solenoids (SS) (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch control valve sticking |
DISASSEMBLE, CLEAN and INSPECT the B clutch
control valve. If the bore or valve is damaged, INSTALL a new main
control valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch latch valve sticking |
DISASSEMBLE, CLEAN and INSPECT the B clutch
latch valve. If the bore or valve is damaged, INSTALL a new main control
valve body. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch hydraulic circuit blocked/leaking |
DISASSEMBLE and INSPECT the main control
valve body and separator plate passages for debris, blockage and leaks.
CLEAN as necessary. REFER to: Main Control Valve Body (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Removal and Installation). |
|
| B clutch separating springs |
DISASSEMBLE and INSPECT the B clutch
separating springs for damage. INSTALL new components as necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
|
| B clutch friction plates |
DISASSEMBLE and INSPECT the B clutch
friction and steel plates for wear and damage. INSTALL new components as
necessary. REFER to: Transmission (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Overhaul). |
A Clutch. Diagnosis and Testing
A Clutch Assembly
A Clutch
For A clutch operation, REFER to: A Clutch (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Description and Operation)...
C Clutch. Diagnosis and Testing
Symptom Chart
C Clutch
For C clutch operation, REFER to: C Clutch (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, Description and Operation)...
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Special Tool(s) / General Equipment
205-123
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308-047
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Remover, Bearing Cup Slide Hammer
