Sounds like my old 2001 Grand Cherokee with Quadra-Trac. It was a beast driving in the snow. Could drive close to speed limits in heavy snow.4WD Auto is not AWD. Do not equate the two. They operate differently.
AWD distributes power to all 4 wheels even if they are spinning at different speeds (which happens in every turn or curve in the road). AWD is superior to 4WD in slick on-road conditions.
4WD Auto is 2WD until the rear tires slip, then 4WD HI is quickly and seamlessly engaged. It returns to 2WD as soon as the rear tires stop slipping. 4WD Auto exists to mitigate how 4WD HI can cause the driver to lose control in higher speed turns & curves in slick on-road conditions and skid off the road. 4WD is far superior to AWD in off-road conditions, which is why the JL doesn't have AWD.