Possible reasons for the lack of reverse gear on a Ford Mondeo with automatic transmission:
1. Problems with solenoids
* Faulty transmission solenoids will prevent hydraulic fluid from shifting into reverse.
2. Low transmission fluid level
* Insufficient fluid levels can cause the reverse clutches to stick or slip.
3. Clogged transmission filter
*A dirty filter can restrict fluid flow and negatively affect gear shifting.
4. Faulty gear position sensor
*A faulty sensor may send an incorrect signal to the transmission control module, resulting in incorrect gear shifting.
5. Problems with gear shift mechanisms
*Broken or worn shift mechanisms may prevent the vehicle from engaging reverse gear.
6. Transmission control module (TCM) malfunction
* Errors in the TCM can cause the shift solenoids or sensors to malfunction.
Diagnostics and troubleshooting:
1. Check the transmission fluid level.
2. Replace the transmission filter if it is dirty.
3. Using a diagnostic scanner, read the trouble codes and determine the faulty component (solenoid, sensor, etc.).
4. Replace the faulty solenoid or sensor.
5. If the problem persists, mechanical components of the transmission, such as clutches or shift mechanisms, may need to be inspected and repaired.
6. If all the above steps fail, check the TCM and replace it if necessary.
Note: Be sure to seek assistance from a qualified mechanic if you are unsure about diagnosing and repairing your transmission.