I am new to the forum and have just obtained my first jeep since the late 1970's. I now have a 2015 Rubicon Unlimited and am still learning how it is supposed to work. I recently tested the 4WD and was surprised to find that the front differential seems to lock when either in 4 high or low. This makes it very hard to take tight turns with the front tires needing to slip through the turn. I asked the service advisor at the local jeep dealer whether or not the differential should always lock when the transmission is placed in 4WD, and they said yes. This makes no sense to me when I already have the axle lock feature that allows me to decide when I want each axle locked. Would someone please clarify for me whether or not the differential should always lock in 4WD, and if so, why even have an axle lock feature? Thanks.