Using "tow/haul" function on Ford Triton
My 2016 Winnie Vista has the tow/haul option on the tranny with the Triton V-10. I understand what it does, question is, when do you put it on..while moving, while stopped, and if when moving, should ...
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As phil-t said, it doesn't matter when you press the button; you can do so any time (though, of course, it's not very useful to do so when the engine isn't running since it doesn't "stick"). You can be moving, standing still, in neutral, in park, in gear, backing up, free-falling off a cliff, etc.
With modern computer controlled automatic transmissions, you can move the shift lever willy-nilly without damaging the transmission or engine, for that matter. It won't downshift if doing so would cause the engine to overrev, even if you've told it to downshift by moving the shifter. That doesn't make arbitrary random shifting a recommended practice; it just means that you stand essentially no chance of harming your vehicle by shifting incorrectly.
With modern computer controlled automatic transmissions, you can move the shift lever willy-nilly without damaging the transmission or engine, for that matter. It won't downshift if doing so would cause the engine to overrev, even if you've told it to downshift by moving the shifter. That doesn't make arbitrary random shifting a recommended practice; it just means that you stand essentially no chance of harming your vehicle by shifting incorrectly.
