New Holland NH 2055 – Transmission Controller (TRANS): No signal from wheel speed sensor

The electronic control module detects that the sensor is failing to generate a valid speed signal, or the signal drops out entirely while the machine is in operation.

• T5
• T6
• T7
• T8
• T9
• TG series (TG210, TG230, TG255, TG285)
• T6000 series (T6010-T6070)
• TM series
• TSA series
• Magnum series (235-340)
• Maxxum series
• Farmall series
• B115B
• TH7.xx

1. 1

   Inspect the wiring harness leading to the transmission output speed sensor for breaks, chafing, or shorts to ground

2. 2

   Disconnect the sensor and check the plug for moisture, dirt, or corroded pins

3. 3

   Compare Sensor 1 and Sensor 2 signals via the ECM; if one shows a valid speed and the other drops out, it flags the erratic/intermittent sensor

4. 4

   Check for related codes like NH 2049 (short/open) or NH 2056/2057 (5-volt reference issues) which point to a broader wiring harness or ECM issue rather than the sensor itself

1. 1

   Locate the Sensor

   Locate the wheel speed / transmission output speed sensor on the transmission housing.

2. 2

   Clean the Area

   Clean the area around the sensor to prevent dirt from entering the transmission housing during removal.

3. 3

   Disconnect the Harness

   Unplug the electrical connector from the sensor. If the connector is damaged, it must be repaired (e.g., using a replacement 4-way connector, part # 87687242).

4. 4

   Remove the Sensor

   Unbolt and carefully pull the faulty speed sensor from the transmission housing.

5. 5

   Install the New Sensor

   Lubricate the O-ring/seal on the new sensor (e.g., 1.4mm ID seal, part # 82012084) and seat it into the housing. Secure it with the retaining bolt.

6. 6

   Reconnect and Clear Codes

   Plug the wiring harness back in, ensuring the connector clicks and locks to maintain a weather-tight seal. Clear the fault codes from the Transmission ECU and test drive the tractor to verify the speed signal is restored.