Case IH 2642 (6157.14) - DEC – DEC (Drivetrain Electronic Control): Unwanted engaged or disengaged of Synchro 6

Output of 'Vehicle speed signal' (pin X7 9/8) has Short circuit to ground, or a mechanical/hydraulic anomaly where Synchronizer 6 is engaging or disengaging without a command from the controller.

• MAXXUM T4E

1. 1

   Inspect the wiring harness for the transmission speed sensors and synchronizer position sensors.

2. 2

   Check Pin X7 9/8 on the transmission controller (DEC) for a short circuit to ground.

3. 3

   Verify the physical linkage and hydraulic solenoid valves controlling Synchro 6 for debris or sticking that would cause unwanted engagement.