Need help with a diagnosis. Yesterday I was towing my boat out of the water when I started sliding so I put it in 4low. At the halfway point of the ramp a loud clunk and kicks out of 4l to 4h. When I stopped in the lot I went through the procedure from 4l to 2wd and drove home with no problems. I disconected the boat and took a drive to try the 4l again. This time no loud clunk but every time I started to move it would jump out of 4l. 4h works fine with no issues.
