Massey Ferguson T41DE – Transmission Control Unit (Autotronic 4 or Autotronic 5): Calibration error

The transmission control system has detected an error during its calibration process, or the transmission requires a recalibration to function correctly.

• 8600 series
• 7600 series
• 6700 S series
• 6400 series
• 5400 series

1. 1

   Check for other active faults (e.g., T41EB for range sensor fault, or T41E0 for clutch solenoid valve failure), as these will prevent successful calibration

2. 2

   Verify transmission oil temperature is between 35°C (95°F) and 45°C (113°F) via the Dash Control Center

3. 3

   Ensure engine speed can be maintained at 1500 rpm ± 100 during the procedure

4. 4

   Warm up components by activating the PowerShuttle (forward and reverse) 10 times in each direction for 5-10 seconds

1. 1

   Position the tractor on flat, level ground.

2. 2

   Warm up the tractor until the transmission oil reaches 35°C - 45°C.

   Engaging the PTO can help speed this up.

3. 3

   Enter calibration mode using the dash controls.

   On some models, this involves holding specific buttons until the right-hand transmission gear screen displays "Ct".

4. 4

   Once "Ct" is displayed, place the PowerShuttle arm into the Forward position to begin the automated calibration.

5. 5

   Leave the tractor running.

   The screen will continuously display "Ct" for approximately 10 minutes. It is normal to hear the transmission shifting and making noises during this time.

6. 6

   Wait for calibration to complete.

   Once calibration is complete, the screen will display the transmission ratio (e.g., "1A/2A").

7. 7

   Save the new calibration settings.

   Place the PowerShuttle into Neutral, disengage the differential lock, idle the tractor down, and switch the engine off.

8. 8

   Restart the tractor and test drive it using a variety of maneuvers.

   Test forward to reverse, neutral to forward, etc., to validate that the shifting is smooth.