Hello from the winter wonderland that is western new york along the great lakes. Took my 94YJ out for a spin today and put it through the paces. The 4WD is shifting in and out of 4hi on its own while I have 4hi engaged. It didn't shift into 4 when I initially engaged it but did on its own after a few minutes of driving. It then shifting back out and into 4wd several times on its own. Just replaced the 4wd actuator a few months and a couple thousand miles ago. Any ideas?