What is the LOCK position for on my automatic hubs?
LOCK is used if the vacuum actuation fails. It will allow you to still lock in the front hubs. It can also be used in the event that you are stuck and cannot get any forward movement to lock in the hubs automatically. Some folks use it during inclement weather or frequent use to ensure that 4WD will be there when needed. Driving with hubs locked will cause no harm but can promote increased wear and the possibility of increased fuel consumption.
