Engagement Concerns: No Forward and No Reverse
DIAGNOSTIC ROUTINES ENGAGEMENT CONCERNS: NO FORWARD AND NO REVERSE
| Possible Component | Reference/Action |
|---|---|
| 207 - ELECTRICAL ROUTINE | |
| Powertrain Control System | |
| PCM and vehicle wiring harnesses (no electrical activity equals third gear default). | Carry out on-board diagnostic tests. Refer to the SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article for diagnosis and testing of the PCM. |
| Repair as required. Clear the DTCs, road test and rerun on-board diagnosis test. | |
| 307 - HYDRAULIC/MECHANICAL ROUTINE | |
| Fluid | |
| Incorrect level. | Adjust to correct level, refer to CHECK FLUID LEVEL . |
| Condition. | Carry out Fluid Condition Check, refer to CHECK THE FLUID CONDITION . |
| Shift Cable/Transmission Range (TR) Sensor | |
| Cable system or TR sensor damaged, misaligned. | Inspect and repair as required. For shift cable information, refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS article. For TR sensor information, refer to TRANSMISSION RANGE (TR) SENSOR DIAGNOSIS CHART . |
| Main Control | |
| Bolts not tightened to specification. | Tighten to specifications. |
| Separator plate damaged. | Inspect for damage. If damaged, repair as necessary. |
| Contamination. | Disassemble and clean. |
| Valves/springs damaged, misassembled, missing, stuck, or bore damaged. | If damaged or parts are missing, install a new main control assembly. If misassembled, reassemble correctly. DO NOT stone, file or sand valves. This will remove the anodized finish and may result in further main control or transaxle damage. |
| Turbine Shaft | |
| Damaged. | Inspect for damage. If damaged, repair as necessary. |
| Fluid Pump Assembly | |
| Bolts not tightened to specification. | Tighten to specifications. |
| Gasket damaged. | Inspect for damage. If damaged, repair as necessary. |
| Porosity, cross leaks, plugged hole. | Inspect for damage. Repair as necessary. |
| Rear Planetary Assembly | |
| Planetary damaged. | Inspect for damage. If damaged, repair as necessary. |
| Forward Clutch Assembly | |
| Seals, piston damaged. | Inspect for damage. Repair as necessary. |
| Friction elements damaged or worn. | Inspect for damage. Repair as necessary. |
| Return springs damaged. | Inspect for damage. Repair as necessary. |
| Forward Planetary Assembly | |
| Planetary damaged. | Inspect for damage. If damaged, repair as necessary. |
| Final Drive Gearset and Differential | |
| Damaged. | Inspect for damage. If damaged, repair as necessary. |
| Torque Converter | |
| Damaged flexplate or adapter plate. | Inspect for damage. Carry out Torque Converter checks, refer to TORQUE CONVERTER DIAGNOSIS . Repair as necessary. |
| Damaged impeller hub. | Inspect for damage. Repair as necessary. |
| Damaged turbine hub. | Inspect for damage. Repair as necessary. |
| Low One-way Clutch | |
| Worn, damaged or assembled incorrectly. | Inspect for damage. Repair as necessary. |