B Clutch
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart
B Clutch
For B clutch operation, REFER to: B Clutch .
B Clutch
| Condition | Possible Sources | Action |
|---|---|---|
| B clutch does not apply | SSB mechanically stuck OFF | INSTALL a new solenoid. REFER to: Shift Solenoids (SS) . |
| 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 . | |
| 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 . | |
| 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 . | |
| CARRY OUT the air pressure test on the B clutch. REFER to: Special Testing Procedures . 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 . | ||
| 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 . | |
| B clutch piston seals | DISASSEMBLE and INSPECT the B clutch piston seals for wear and damage. INSTALL new components as necessary. REFER to: Transmission . | |
| 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 . | |
| B clutch always applied | SSB mechanically stuck ON | INSTALL a new solenoid. REFER to: Shift Solenoids (SS) . |
| 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 . | |
| 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 . | |
| 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 . | |
| Front support assembly, sun gear no. 1 | DISASSEMBLE and INSPECT the components for wear and damage. INSTALL new components necessary. REFER to: Transmission . | |
| B clutch separating springs | DISASSEMBLE and INSPECT the B clutch separating springs for damage. INSTALL new components as necessary. REFER to: Transmission . | |
| 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 . | |
| 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 . REFER to: Adaptive Learning Drive Cycle . |
| 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 . | |
| SSB mechanically sticking | INSTALL a new solenoid. REFER to: Shift Solenoids (SS) . | |
| 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 . | |
| 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 . | |
| 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 . | |
| CARRY OUT the air pressure test on the B clutch. REFER to: Special Testing Procedures . 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 . | ||
| B clutch piston seals | DISASSEMBLE and INSPECT the B clutch piston seals for wear and damage. INSTALL new components as necessary. REFER to: Transmission . | |
| 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 . | |
| 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 . REFER to: Adaptive Learning Drive Cycle . |
| 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 . | |
| SSB mechanically sticking | INSTALL a new solenoid. REFER to: Shift Solenoids (SS) . | |
| 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 . | |
| 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 . | |
| 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 . | |
| B clutch separating springs | DISASSEMBLE and INSPECT the B clutch separating springs for damage. INSTALL new components as necessary. REFER to: Transmission . | |
| 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 . |