New Holland 2373 – TCM: Main Clutch Not Calibrated

The transmission control system lacks the necessary calibration data for the master clutch (logically referred to as Clutch 19). This data is crucial for the electronic controller to determine the precise engagement point and fill time of the clutch pack. Without this information, the transmission cannot ensure smooth clutch engagement, leading to harsh shifting, delayed gear changes, or an inability to operate the transmission correctly. This fault often appears after a new transmission controller is installed.

• T7 Series
• T7.210
• T7.235
• T7.245
• T7.260
• T6 Series
• T6.120
• T6.155
• T6050
• TM Series
• TM165
• 8000 Series
• 8260
• 8560
• 8770
• 8870
• T8 Series

1. 1

   Ensure the tractor is parked on level ground with the wheels chocked to prevent unexpected movement

2. 2

   Verify the operator is in the seat so the seat switch remains depressed throughout the procedure

3. 3

   Ensure the parking brake is fully engaged and all hydraulic remote levers are in the neutral position

4. 4

   Check that the transmission oil temperature is within the required range (10°C to 60°C / 50°F to 140°F, ideally between 50°C and 60°C). Calibration will not proceed if the oil is too cold (U21) or too hot (CH or above 105°C)

5. 5

   Set the engine speed to 1200 RPM +/- 100 RPM

6. 6

   Ensure the shuttle lever is in the Neutral position before starting the calibration

1. 1

   Initiate Calibration Mode

   With the tractor turned off, press and hold both the upshift and downshift buttons (rabbit and turtle icons). Start the engine and release the buttons once it is running. The display should now show the transmission oil temperature.

2. 2

   Prepare for Calibration

   Verify the transmission oil is at the correct temperature and set the engine speed to approximately 1200 RPM.

3. 3

   Enter Calibration Menu

   Press the upshift button until 'CL' and then 'Dt' appears on the display. Depress the clutch pedal, move the shuttle lever to the Forward position, and then release the clutch.

4. 4

   Start Automatic Calibration

   Press the automatic function switch. The engine speed will increase, and the automatic calibration sequence will begin, cycling through the clutches (e.g., A, B, C, D, E, F1, F2, F3, and Reverse). The display will indicate which clutch pack is currently being calibrated.

5. 5

   Perform Individual Clutch Calibration (If applicable)

   For models requiring individual calibration: use the upshift button to select a specific clutch (e.g., 'A'). Press and hold the downshift button to calibrate. Once the calibration value is displayed, release the downshift button and use the upshift button to select the next clutch. Repeat until all are calibrated.

6. 6

   Store Calibration Values

   When the calibration sequence is successfully finished, 'End' or 'CF' will appear on the display. Turn the engine off and wait for at least 10-15 seconds to allow the new calibration values to be stored in the controller's memory.

7. 7

   Post-Calibration Check

   Restart the tractor and operate it to confirm that shifting is smooth and the fault code has cleared.