- Faulty shift solenoid
- Low transmission fluid level
- Dirty or blocked transmission filter
- Worn or damaged transmission bands
- Faulty transmission control module (TCM)
- Mechanical failure within the transmission
Diagnosis:
- Check the transmission fluid level and condition
- Inspect the transmission filter for dirt or blockages
- Perform a transmission diagnostic scan to check for any fault codes
- Inspect the transmission bands for wear or damage
- Test the shift solenoid for proper operation
Repair:
- Replace the faulty shift solenoid
- Add or change the transmission fluid
- Clean or replace the transmission filter
- Replace worn or damaged transmission bands
- Replace the faulty TCM
- Overhaul or replace the transmission
