Case IH 64 – Transmission Control Module (ECM/TCU): SYNCRO_SHTL_ENG_ERR (41 SL Dis)

The F/R (Forward/Reverse) Synchronizer did not move into the shuttle (reverse) position.

• JXC
• JX55
• JX60
• JX65
• JX70
• JX75
• JX80
• JX85
• JX90
• JX95
• JX100U
• JX1070U
• JX1080U
• JX1090U
• JX1100U
• Farmall 60
• Farmall 70
• Farmall 80
• Farmall 85C
• Farmall 85U
• Farmall 90
• Farmall 95
• Farmall 105U
• Farmall 115U
• Maxxum (MXM) Series
• Puma Series

1. 1

   Inspect external levers and relay rods for correct adjustment

2. 2

   Check rod pivots for stiffness or partial seizure and lubricate them

3. 3

   Perform Electronic Service Tool (EST) / CDU checks: Check H9, channel 5 to verify if it is outside the allowable range

4. 4

   Check H5 for failure to display 'd28'

5. 5

   Check HD for an 'unkn' display

1. 1

   Turn the starter key to the OFF position.

2. 2

   Remove the rear left-hand wheel and the solenoid valves unit guard.

3. 3

   Replace the HI and LO forward gears synchroniser position sensor pushbutton (switch).

4. 4

   Test the tractor to see if the fault persists.

5. 5

   If the fault persists, replace the HI and LO forward gears synchroniser solenoid valve.

6. 6

   Test the tractor again to see if the fault persists.

7. 7

   If the fault persists, the issue is internal. Check the hydraulic system and the synchroniser unit itself.

8. 8

   If internal components are worn or damaged, split the tractor, remove the transmission/gearbox, and physically replace the faulty F/R Synchronizer assembly.

9. 9

   Once the mechanical or electrical cause is resolved, clear the error using the CDU or EST (Electronic Service Tool) in the HF Menu.