t-case

This is my first time to join a forum, so please bear with me. My 2020 Gladiator Max Tow Sport with 5000 miles will not stay engaged in 4L or 4H. The Jeep has a 3.5” lift, but I did not alter the t-case position. I will keep this limited to 4L issue for now. When I shift to 4L, I hear the...