towing with older 2v 5.4 triton

I had a 99 Supercab and then a 2003 Supercrew, both 5.4L 4WD 3.73. We bought our TT when we had the 2003 and towed for two seasons. It performed very well. Two gears to accelerate and 3rd to cruise. Mine was happier at 70mph closer to 3000rpm than 62mph and 2400rpm. I would cruise at 67ish mph, let speed drop to about 55mph on hills, then downshift to 2nd and hold speed until the crest.

Change all your fluids.