1. Low Transmission Fluid: Check the transmission fluid level and top it up if necessary. Low fluid levels can cause shifting problems.
2. Dirty Filter: A dirty transmission filter can restrict fluid flow and affect shifting. Try replacing the transmission fluid filter.
3. Shift Solenoid/Sensor Problem: A faulty shift solenoid or sensor can prevent the transmission from shifting properly. Have these components tested and replaced if necessary.
4. Incorrect Shift linkage adjustment: The shift linkage may be out of adjustment, preventing it from shifting properly. Check and adjust the shift linkage according to the manufacturer's specifications.
If none of the above solutions resolve the issue, you may need to consult a qualified mechanic to diagnose and repair the problem.
