Powertrain
Direct clutch assembly. Diagnosis and Testing
In this manual: Powertrain
~8min read
Direct Clutch
For direct clutch (3,5,R) applied,
REFER TO: Transmission Description - System Operation and Component Description (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Description and Operation).
REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Description and Operation).
Direct Clutch
| Condition | Possible Sources | Action |
| Direct (3,5,R) clutch not applied | SSB solenoid filter clogged | CLEAN or INSTALL a new solenoid. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| SSB mechanically stuck off | INSTALL a new solenoid. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). | |
| Direct (3,5,R) clutch regulator valve stuck in OFF position | DISASSEMBLE, CLEAN and INSPECT the direct (3,5,R) clutch regulator valve. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). If the bore or valve is damaged, INSTALL a new main control valve body. |
|
| SSB SIG, C35R, C35R SUP 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 (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| REV SUPPLY/DRIVE 2 to C35R SUP check ball missing/damaged | REMOVE the main control valve body and INSPECT the check ball for absence or damage. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| C35R supply hydraulic circuit clogged or leaking | DISASSEMBLE and INSPECT the transmission case cover and support tower passages for debris/blockage. CLEAN as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Rear Planetary Sun Gear and Shell Assembly | INSPECT the sun gear and housing for wear and damage. INSTALL new components as necessary. REFER TO: Transmission Case (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch friction plates | DISASSEMBLE and INSPECT the direct (3,5,R) clutch friction and steel plates. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch piston seal leak | DISASSEMBLE and INSPECT the direct (3,5,R) clutch piston and seals. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch is always applied | SSB O-rings damaged/leaking | INSTALL a new solenoid. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| SSB mechanically stuck in the applied position | INSTALL a new solenoid. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). | |
| Direct (3,5,R) clutch regulator valve stuck in the applied position | DISASSEMBLE, CLEAN and INSPECT the direct (3,5,R) clutch regulator valve and spring. If the bore or valve is damaged, INSTALL a new main control valve body. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| SSB SIG, C35R, C35R SUP hydraulic circuits blocked/leaking | DISASSEMBLE and INSPECT the main control valve body passages and separator plate for leaks. CLEAN as necessary. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| Rear Planetary Sun Gear and Shell Assembly | INSPECT the sun gear and housing for damage that would prevent free rotation. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch friction plates | DISASSEMBLE and INSPECT the direct (3,5,R) clutch friction and steel plates. Measure the clutch pack clearance. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch piston return spring | INSPECT the return spring for damage. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch delayed/soft/slipping engagement | Incorrect shift strategy programmed in PCM | Remove the SSB and record the solenoid range number. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). Using the diagnostic tool, verify that the correct range number is stored in the PCM. If the range numbers do not match, INSTALL a new SSB with the correct range number. |
| SSB solenoid filter partially restricted or clogged | INSTALL a new solenoid. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). | |
| SSB mechanically stuck on | INSTALL a new solenoid. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). | |
| Direct (3,5,R) clutch regulator valve stuck | DISASSEMBLE, CLEAN and INSPECT the direct (3,5,R) clutch regulator valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| Direct (3,5,R) clutch boost valve stuck in the applied position | DISASSEMBLE, CLEAN and INSPECT the direct (3,5,R) clutch boost valve and spring. If the bore, valve or spring is damaged, INSTALL a new main control valve body. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| SSB SIG, C35R, C35R SUP 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 (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| REV SUPPLY/DRIVE 2 to C35R SUP check ball missing/damaged | REMOVE the main control valve body and INSPECT the check ball for absence or damage. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| C35R supply hydraulic circuit clogged or leaking | DISASSEMBLE and INSPECT the transmission case cover and support tower passages for debris/blockage. CLEAN as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch friction plates | DISASSEMBLE and INSPECT the direct (3,5,R) clutch friction and steel plates. Measure the clutch pack clearance. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch piston seal leak | DISASSEMBLE and INSPECT the direct (3,5,R) clutch piston and seals. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch harsh engagement | Incorrect shift strategy programmed in PCM | Remove the SSB and record the solenoid range number. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). Using the diagnostic tool, verify that the correct range number is stored in the PCM. If the range numbers do not match, INSTALL a new SSB with the correct range number. |
| SSB mechanically stuck on | INSTALL a new solenoid. REFER TO: Solenoid (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). | |
| Direct (3,5,R) clutch regulator valve stuck | DISASSEMBLE, CLEAN and INSPECT the direct (3,5,R) clutch regulator valve and spring. If the bore, valve or spring is damaged, INSTALL a new main control valve body. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| Direct (3,5,R) clutch boost valve stuck | DISASSEMBLE, CLEAN and INSPECT the direct (3,5,R) clutch boost valve and spring. If the bore, valve or spring is damaged, INSTALL a new main control valve body. REFER TO: Main Control Valve Body (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| SSB SIG, C35R, C35R SUP 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 (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). | |
| Direct (3,5,R) clutch friction plates | DISASSEMBLE and INSPECT the direct (3,5,R) clutch friction and steel plates. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
|
| Direct (3,5,R) clutch piston return spring | INSPECT the return spring for correct installation and damage. INSTALL new components as necessary. REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Overhaul). |
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