I’ve always wheeled in a manual, currently have the 6sp. My wife and son each have a auto. The son has the 3.8 with auto, which has D, 1, and 2. It actually has 4.10‘s in it. While he is learning I am thinking the jeep should get better traction then it is with minor rock crawling. Then it hit me one day, when rock crawling should he put in 1 or 2 instead of D? Also if he puts it in 1 or 2 will it shift if he hits too high of an RPM? I know sounds like a basic question, but I am used to manuals.