Tow haul mode

[sssooo]

What is the tow haul used for?

[Grit_dog]

The assertion that tow/haul auto downshifts on grades etc is a real assumption not know what vehicle/trans is being talked about. Considering the more fully integrated features like being asserted are not a thing until the last decade giver take. Especially considering the context of a Class A which may likely be running older more obsolete drivetrain components than comparable light duty trucks of the same year. (Ex: V10 motorhome chassis were produced until a couple years ago, but stopped in the pickups in 2010 I believe.)
Sometimes the advice is as ill informed as the question.
Like many questions here, ALOT can be learned by simply “trying” the feature and even more by actually reading the owners manual or an owners manual for a vehicle with the same trans.

THEN, after having just a small bit of basic experience, one can ask a slightly more informed question, if a question about the most basic operational parameters of a simple vehicle still exist.

[valhalla360]

Horsedoc wrote:
This Newmar is our first gasser-Ford v10- coach and I am not sure I am doing things right. Seems that on long stretches of interstate or surface roads, the engine doesn't rev as high at the same speed. (2016 Canyon Star 3911)

Assuming you aren't overloaded, the steady speed on level ground should have the same RPM "on" or "off". This assumes the overall drivetrain is sufficient to comfortably hold in top gear.

If anything, I would expect the RPM to be higher with it "on", as it might hold in a lower gear. Same speed in a lower gear will result in higher RPM.

[valhalla360]

The biggest impact is if you tap the brakes on a downhill, it will automatically downshift providing some engine braking. Tap it again if you need more. Having the RPM up around 3000-3500 provides a lot of braking and won't hurt anything (even up into the 4000's is fine but I try no to let things get that far out of hand).

At least with our F250, it will also start downshifting if you are coasting up to a stop light which reduces brake wear.

I don't have an issue with it but upshifting while accelerating I don't find as much benefit.

As a motorhome, it should always be in tow/haul as you never run lightly loaded.

[Horsedoc]

This Newmar is our first gasser-Ford v10- coach and I am not sure I am doing things right. Seems that on long stretches of interstate or surface roads, the engine doesn't rev as high at the same speed. (2016 Canyon Star 3911)

[way2roll]

The tow/haul feature: Delays upshifts to reduce the frequency of transmission shifting. Provides engine braking in all forward gears, which will slow your vehicle and assist you in controlling your vehicle when descending a grade.