| 307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50 | 2013 - 2014 MKZ |
| Diagnosis and Testing | Procedure revision date: 09/28/2012 |
Overdrive Clutch
For overdrive clutch operation,
REFER to:
Overdrive Clutch Assembly
(307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Description and Operation).
Overdrive Clutch
| Condition | Possible Sources | Action |
| Overdrive clutch does not apply | Solenoid body filter blocked to Shift Solenoid D (SSD) |
CLEAN or INSTALL a new solenoid body filter screen.
REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
| Shift Solenoid D (SSD) is mechanically stuck OFF |
INSTALL a new solenoid body.
REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). PERFORM the Transmission Strategy Download, REFER to: Transmission Strategy Download (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, General Procedures). |
|
| Overdrive clutch (CBLR/C456) regulator valve stuck OFF |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE, CLEAN and INSPECT the overdrive clutch regulator valve. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). If bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| Shift Solenoid D (SSD) SIG, CBLR/C456 SUPPLY, C456 SUPPLY, C456 hydraulic circuits blocked/leaking |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE and INSPECT the main control valve body and separator plate passages for debris/blockage. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). CLEAN as necessary. |
|
| Multiplex shift valve stuck in applied position |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE, CLEAN and INSPECT the multiplex shift valve. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). If bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| C456 supply hydraulic circuit blocked or leaking |
DISASSEMBLE and INSPECT the transmission cover and support tower passages for debris/blockage.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). CLEAN as necessary. |
|
| Rear planetary carrier/center ring gear |
INSPECT the planetary carrier/center ring gear for wear and damage. INSTALL new components necessary.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
|
| Overdrive clutch friction plates |
DISASSEMBLE and INSPECT the overdrive clutch friction and steel plates. INSTALL new components as necessary.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
|
| Overdrive clutch piston seal leakage |
INSTALL a new overdrive clutch piston and seals.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
|
| Overdrive clutch always applied | Solenoid body filter seal damaged at Shift Solenoid D (SSD) |
INSTALL a new solenoid body filter screen.
REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
| Shift Solenoid D (SSD) mechanically stuck ON |
INSTALL a new solenoid body.
REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). PERFORM the Transmission Strategy Download, REFER to: Transmission Strategy Download (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, General Procedures). |
|
| Overdrive clutch regulator (CBLR/C456) valve stuck ON |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE, CLEAN and INSPECT the overdrive clutch regulator valve and bias spring. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). If bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| Shift Solenoid D (SSD) SIG, CBLR/C456 SUPPLY, C456 SUPPLY, C456 hydraulic circuits blocked/leaking |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE and INSPECT the main control valve body and separator plate passages for leakage. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). CLEAN as necessary. |
|
| Overdrive clutch friction plates |
DISASSEMBLE and INSPECT the overdrive clutch friction and steel plates. INSTALL new components as necessary.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
|
| Overdrive clutch piston return spring. |
INSPECT the return spring for damage. INSTALL new components as necessary.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
|
| Overdrive clutch delayed/soft/slipping apply | Incorrect Transmission Strategy programmed into PCM |
PERFORM the Transmission Strategy Download,
REFER to: Transmission Strategy Download (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, General Procedures). |
| Solenoid body filter seal damaged at Shift Solenoid D (SSD) |
INSTALL a new solenoid body filter screen.
REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| Shift Solenoid D (SSD) mechanically sticking |
INSTALL a new solenoid body.
REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). PERFORM the Transmission Strategy Download, REFER to: Transmission Strategy Download (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, General Procedures). |
|
| Overdrive clutch regulator (CBLR/C456) valve stuck ON |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE, CLEAN and INSPECT the overdrive clutch regulator valve. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). If bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| Overdrive clutch (CBLR/C456) boost valve stuck ON |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE, CLEAN and INSPECT the overdrive clutch boost valve and bias spring. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). If bore, valve or spring is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| Shift Solenoid D (SSD) SIG, CBLR/C456 SUPPLY, C456 SUPPLY, C456 hydraulic circuits blocked/leaking |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE and INSPECT the main control valve body and separator plate passages for leakage. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). CLEAN as necessary. |
|
| Multiplex shift valve sticking |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE, CLEAN and INSPECT the multiplex shift valve. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). If bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| C456 supply hydraulic circuit blocked or leaking |
DISASSEMBLE and INSPECT the transmission cover and support tower passages for debris/blockage.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). CLEAN as necessary. |
|
| Overdrive clutch friction plates |
DISASSEMBLE and INSPECT the overdrive clutch friction and steel plates. INSTALL new components as necessary.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
|
| Overdrive clutch piston seal leakage |
INSTALL a new overdrive clutch piston and seals.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
|
| Overdrive clutch harsh apply | Incorrect Transmission Strategy programmed into PCM |
PERFORM the Transmission Strategy Download,
REFER to: Transmission Strategy Download (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, General Procedures). |
| Shift Solenoid D (SSD) mechanically sticking |
INSTALL a new solenoid body.
REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). PERFORM the Transmission Strategy Download, REFER to: Transmission Strategy Download (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, General Procedures). |
|
| Overdrive clutch regulator (CBLR/C456) valve sticking |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE, CLEAN and INSPECT the overdrive clutch regulator valve. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). If bore, valve or spring is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| Overdrive clutch (CBLR/C456) boost valve sticking |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE, CLEAN and INSPECT the overdrive clutch boost valve and bias spring. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). If bore, valve or spring is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). |
|
| Shift Solenoid D (SSD) SIG, CBLR/C456 SUPPLY, C456 SUPPLY, C456 hydraulic circuits blocked/leaking |
REMOVE the main control valve body.
REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). DISASSEMBLE and INSPECT the main control valve body and separator plate passages for debris/blockage. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). CLEAN as necessary. |
|
| Overdrive clutch friction plates |
DISASSEMBLE and INSPECT the overdrive clutch friction and steel plates. INSTALL new components as necessary.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
|
| Overdrive clutch piston return spring |
INSPECT the return spring for proper installation and damage. INSTALL new components as necessary.
REFER to: Transmission (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Disassembly). |
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