Massey Ferguson 04.1.92 – Transmission Control Module (TRANS): Issue With Speed Sensor Values (TRANS)

The tractor's computer is receiving an invalid, erratic, or out-of-range signal from the transmission speed sensor. When this occurs, the system may default to a backup value, which can result in rough shifting, poor fuel economy, or a loss of optimized transmission control.

• 4707
• 4708
• 4709
• 4710
• T4 (2015-2021)
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S

1. 1

   Visually inspect the wiring harness and connections leading to the transmission speed sensor for damage, corrosion, or shorts.

2. 2

   Perform a resistance test on the transmission speed sensor (specification is typically 540 +/- Ohms).

3. 3

   Perform software diagnostics using the OEM Wintest software to verify sensor failure before replacement.

1. 1

   Locate the Sensor

   The transmission speed sensor is located on the transmission housing. Note: On some larger models, accessing transmission/engine speed sensors may require removing a rear tire for clearance.

2. 2

   Repair Wiring

   If the diagnostic checks reveal a wiring issue, repair the damaged wires or replace the connector pigtail.

3. 3

   Replace the Sensor

   If the sensor fails the Wintest software test or the resistance test, unthread the old sensor and install the replacement. Ensure the sealing ring/O-ring is properly seated to prevent oil leaks.

4. 4

   Clear Codes

   After installation, you must clear the fault codes from the tractor's computer to ensure the module recognizes the new sensor and restores proper shift timing.