Electronic Synchronizer

The electronic synchronizer is used in model 4401 and 4470 transfer cases to provide smoother shifting. The system requires no maintenance or service.

The system consists of a relay and a clutch coil (electromagnet) inside the transfer case. The clutch coil replaces the conventional blocker ring. When energized, the clutch coil provides synchronization, resulting in a smooth shift. When the transfer case lever is moved to "4 HI" or "4 LO" position, current is supplied to the normally closed relay. Current flows through the relay to the clutch coil. When the front axle engages, the axle switch energizes the relay coil. The relay switch then opens, and current to the clutch coil is interrupted.