In 4-wheel lock, the front and rear driveshafts are locked together all the time. Avoid that when driving on dry pavement as it puts a lot of stress on the transfer case.
4-wheel auto leaves the two driveshafts unlocked until their speeds differ due to a spinning tire, then they lock up momentarily. You are unlikely to feel the engagement, but it makes going through deep snow a lot of fun.
Friday, November 18th, 2022 AT 3:45 PM