Symptoms of a faulty automatic transmission overrunning clutch:
1. Slipping when shifting gears:
* When upshifting, the engine speed increases, but the vehicle does not accelerate accordingly.
* The transmission slips during acceleration, causing engine speed fluctuations.
2. Difficulty shifting down gears:
* There may be a bump or lag when downshifting, as if something is blocking the shift.
* The transmission may become stuck in neutral or may not downshift until the last moment.
3. Extraneous noise and vibration:
* A faulty overrunning clutch may produce a humming or grinding noise when shifting gears or idling the engine.
* Vibration may occur, especially when accelerating.
4. Transmission fluid leaks:
*If the overrunning clutch is damaged, it may cause transmission fluid to leak.
*Low transmission fluid levels can cause shifting problems and overheating of the transmission.
5. Burning smell:
* If the overrunning clutch is severely malfunctioning, a burning smell may be felt due to overheating and friction of the parts.
6. Check Engine Light:
*In some cases, a faulty overrunning clutch can cause the check engine light to turn on, indicating the presence of a transmission-related error code.
Please note: the presence of these symptoms does not necessarily mean that the overrunning clutch is faulty. An accurate diagnosis requires professional diagnostics.