Good care and a little luck you should be able to get another 87,000 miles.
Make sure you do all the recommended maintenance as listed in the owner's manual. I would also add a transmission fluid exchange w/filter cleaning. (No a flush is not the same or as good, just get it changed.
Trailer towing will shorten the lifespan, but if you are not stretching it too far (too heavy or too many miles, it should not make much of a change. What weight does Ford recommend and what weight are you planing to tow?