No Range Shift

1. If the vehicle won't shift into 4L, check the SPEED SENSOR and the TRANSMISSION INTERLOCKS (NEUTRAL or clutch IN).
2. Also check the 4L switch (C3) to see if the Module is getting a signal. Check for corroded connections.
3. If the vehicle won't shift back to 4H, follow the proper sequence of being stopped and having the vehicle in NEUTRAL (or Clutch IN) when PUSHING the switch. Check the 4L switch and the Motor Position Sensor.