How does the Vanagon Syncros differential lock work?
Pull the knob to engage the lock. Push the knob back in to disengage the lock. Pulling the knob actually “requests” that the diff lock be engaged. It will lock when the rotation of the axles lines up for locking and they are moving at about the same speed. When the locking occurs, the light on the dash will light up. The manual says to drive straight ahead after pulling the knob, but I’ve found that by doing this it can take a very long time for engagement. This is because the axles are not lined up and are traveling at the same speed and don’t really make any progress toward lining up. I’ve had better success at traveling a slight curve for quicker engagement.
