1. Transmission Fluid Issues:
Check the transmission fluid level and condition; low fluid level or degraded fluid can lead to gearbox malfunctions. Ensure transmission fluid is replaced according to the manufacturer's recommended intervals.
2. Faulty Sensors:
Defective input or output shaft position sensors, solenoids, or other control system components can prevent engagement in forward gears while preserving reverse gear functionality. Have qualified technician diagnose by conducting system scans & checks.
3. Mechanical Failure:
Internal mechanical damage within the transmission, like clutch failure or damage to the planetary gear assembly, may result in loss of forward motion although reverse continues to work; further diagnose necessary.
4. Wiring Problems:
Examine wiring harness; malfunctioning electrical connections in transmission related parts could cause this scenario; check that electrical connectors are free from damage & corrosion.
