I took my stock Dunlop AT tires to the limit today where they were buried pretty well and were covered with mud and the crawl mode saved me. I was out wheeling and got into some deep, sticky mud which was deeply rutted. The locker got me moving back and forward, but could not get out of the rutted muddy track. I got out and thought about my options. Tried a couple of things that did not work. I then thought to try using the crawl feature to get out. That thing worked like it was on a mission. The truck crawled right up and out of the ruts like it was nothing. I was on my way with only a few new scratches.