If anything, when pulling out of a boat launch, drop it all the way into "1". Your ranger is equipped with the 5R55W transmission. First gear is a 3.22:1 gear reduction. Second gear, on the other hand is a 2.41:1 reduction. First gear has a tremendous leverage advantage. When you pull in a higher gear, your torque converter is working harder. In the process of multiplying your engines torque, it creates a lot of heat. Heat is the biggest enemy of an automatic transmission. I doubt the trans will heat up to the point of a failure during a boatlaunch pull, but starting off in town in 2nd all the time could heat it up. Next time you have a load behind the 3.0L of yours, drop it into "1" and it will effortlessly tug that trailer around compared to the 2nd gear startoff!