Overdrive Clutch
For overdrive clutch operation,
REFER to: Transmission
Description (307-01A Automatic Transmission - 6-Speed Automatic
Transmission – 6F15, Description and Operation).
REFER to: Transmission Description - System Operation and Component
Description (307-01B Automatic Transmission - 6-Speed Automatic
Transmission – 6F35, Description and Operation).
REFER to: Overdrive Clutch Assembly (307-01A Automatic Transmission -
6-Speed Automatic Transmission – 6F15, Description and Operation).
REFER to: Overdrive Clutch Assembly (307-01B Automatic Transmission -
6-Speed Automatic Transmission – 6F35, Description and Operation).
NOTE: The Low Reverse and Overdrive clutches use SSD, CBLR/C456 regulator valve, SSD SIG and CBLR/C456 SUPPLY hydraulic circuits, and the multiplex shift valve. Faults with these components will affect reverse, 1,4,5 and 6 gears. If the vehicle operates correctly in first and reverse, these components are functioning properly
Overdrive Clutch
Condition | Possible Sources | Action |
Overdrive clutch does not apply | SSD filter screen blocked |
CLEAN or INSTALL a new solenoid. REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). REFER to: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Removal and Installation). |
SSD is mechanically stuck OFF |
INSTALL a new solenoid. REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). REFER to: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Removal and Installation). |
|
Overdrive clutch (CBLR/C456) regulator valve stuck OFF |
DISASSEMBLE, CLEAN and INSPECT the overdrive
clutch regulator valve. If bore or valve is damaged, INSTALL a new main
control. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
SSD SIG, CBLR/C456 SUPPLY, C456 SUPPLY, C456 hydraulic circuits blocked/leaking |
DISASSEMBLE and INSPECT the main control valve
body and separator plate passages for debris/blockage. CLEAN as
necessary. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Multiplex shift valve stuck in applied position |
DISASSEMBLE, CLEAN and INSPECT the multiplex
shift valve. If bore or valve is damaged, INSTALL a new main control
valve body. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
C456 supply hydraulic circuit blocked or leaking |
DISASSEMBLE and INSPECT the transmission cover
and support tower passages for debris/blockage. CLEAN as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Rear planetary carrier/center ring gear |
INSPECT the planetary carrier/center ring gear for wear and damage. INSTALL new components necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch friction plates |
DISASSEMBLE and INSPECT the overdrive clutch
friction and steel plates. INSTALL new components as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch piston seal leakage |
INSPECT the overdrive clutch piston and seals. INSTALL new components as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch always applied | SSD O-rings damaged |
INSTALL a new solenoid. REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). REFER to: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Removal and Installation). |
SSD mechanically stuck ON |
INSTALL a new solenoid. REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). REFER to: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Removal and Installation). |
|
Overdrive clutch regulator (CBLR/C456) valve stuck ON |
DISASSEMBLE, CLEAN and INSPECT the overdrive
clutch regulator valve and bias spring. If bore or valve is damaged,
INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
SSD SIG, CBLR/C456 SUPPLY, C456 SUPPLY, C456 hydraulic circuits blocked/leaking |
DISASSEMBLE and INSPECT the main control valve
body and separator plate passages for leakage. CLEAN as necessary. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch friction plates |
DISASSEMBLE and INSPECT the overdrive clutch
friction and steel plates. INSTALL new components as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch piston return spring. |
INSPECT the return spring for damage. INSTALL new components as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch delayed/soft/slipping apply | Incorrect Transmission Strategy programmed into PCM |
Remove SSD and record solenoid band number. REFER to: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Removal and Installation). REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). Using the scan tool, verify the correct band number is stored in the PCM . If band numbers do not match, replace SSD with correct band number. |
SSD filter screen partially blocked |
INSTALL a new solenoid. REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). REFER to: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Removal and Installation). |
|
SSD mechanically sticking |
INSTALL a new solenoid. REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). REFER to: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Removal and Installation). |
|
Overdrive clutch regulator (CBLR/C456) valve stuck ON |
DISASSEMBLE, CLEAN and INSPECT the overdrive
clutch regulator valve. If bore or valve is damaged, INSTALL a new main
control valve body. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
SSD SIG, CBLR/C456 SUPPLY, C456 SUPPLY, C456 hydraulic circuits blocked/leaking |
DISASSEMBLE and INSPECT the main control valve
body and separator plate passages for leakage. CLEAN as necessary. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Multiplex shift valve sticking |
DISASSEMBLE, CLEAN and INSPECT the multiplex
shift valve. If bore or valve is damaged, INSTALL a new main control
valve body. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
C456 supply hydraulic circuit blocked or leaking |
DISASSEMBLE and INSPECT the transmission cover
and support tower passages for debris/blockage. CLEAN as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch friction plates |
DISASSEMBLE and INSPECT the overdrive clutch
friction and steel plates. INSTALL new components as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch piston seal leakage |
INSPECT the overdrive clutch piston and seals. INSTALL new components as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch harsh apply | Incorrect Transmission Strategy programmed into PCM |
Remove SSD and record solenoid band number. REFER to: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Removal and Installation). REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). Using the scan tool, verify the correct band number is stored in the PCM . If band numbers do not match, replace SSD with correct band number. |
SSD O-rings damaged |
INSTALL a new solenoid. REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). |
|
SSD mechanically sticking |
INSTALL a new solenoid. REFER to: Solenoid (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Removal and Installation). |
|
Overdrive clutch regulator (CBLR/C456) valve sticking |
DISASSEMBLE, CLEAN and INSPECT the overdrive
clutch regulator valve. If bore, valve or spring is damaged, INSTALL a
new main control valve body. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch (CBLR/C456) boost valve sticking |
DISASSEMBLE, CLEAN and INSPECT the overdrive
clutch boost valve and bias spring. If bore, valve or spring is damaged,
INSTALL a new main control valve body. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
SSD SIG, CBLR/C456 SUPPLY, C456 SUPPLY, C456 hydraulic circuits blocked/leaking |
DISASSEMBLE and INSPECT the main control valve
body and separator plate passages for debris/blockage. CLEAN as
necessary. REFER to: Main Control Valve Body (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch friction plates |
DISASSEMBLE and INSPECT the overdrive clutch
friction and steel plates. INSTALL new components as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |
|
Overdrive clutch piston return spring |
INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. REFER to: Transmission (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Overhaul). REFER to: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F15, Overhaul). |