- Check the transmission fluid level and add more if necessary.
- Low fluid levels can cause the transmission to slip and not shift properly.
2. Bad Transmission Solenoids:
- Solenoids in the transmission control when and how gears should shift.
- Faulty solenoids can lead to shifting problems.
3. Worn Clutch Packs:
- Clutch packs apply pressure to shift gears.
- Worn clutch packs can lead to transmission slipping and shifting issues.
4. Faulty Transmission Control Module (TCM):
- Controls shifting.
- A malfunctioning TCM can lead to erratic shifting or no shifting at all.
5. Speed Sensors Issues:
- Monitor vehicles speed and provide data to PCM and TCM for shifting accordingly.
- Faulty speed sensor data might confuse transmission control logic causing shifting failures.
6. Worn Gear Assembly:
- Physical damage.
- Shifting problem if broken or severely worn. Check and repair accordingly.
