Massey Ferguson T41DC – Transmission Control Unit (Autotronic 4 or Autotronic 5): Calibration error

The transmission calibration process has failed, was interrupted, or the transmission controller has lost its calibration parameters.

• Massey Ferguson 8600 Series
• MF 8670
• MF 8690

1. 1

   Ensure the engine speed is set and maintained at exactly 1500 rpm ± 100

2. 2

   Ensure the PowerControl lever is kept in the forward position

3. 3

   Check for any other active transmission sensor faults (such as range position sensors or clutch solenoid faults) that might be preventing a successful calibration

1. 1

   Warm up transmission fluid

   Bring the tractor's transmission fluid up to normal operating temperature.

2. 2

   Set engine RPM

   Set the engine RPM to 1500 ± 100.

3. 3

   Position PowerControl lever

   Move the PowerControl lever to the forward position.

4. 4

   Initiate calibration

   Initiate the transmission calibration phase via the DOT MATRIX display on the instrument cluster or by using the AGCO WINTEST diagnostic software tool.

5. 5

   Allow calibration cycle

   Allow the Autotronic controller to cycle through the clutch fill and pressure calibrations.

6. 6

   Contact dealer for reprogramming

   If the calibration repeatedly fails and throws T41DC, the Autotronic controller may require a software re-flash or reprogramming by an authorized dealer using the AGCO diagnostic tool.