I assumed it took the truck out of overdrive,,,but when I press it going 65 in 6th gear the light comes on in the dash but I don't notice a down shift ??

 

Did you check the owners manual for information?

Excerpted from the owners manual ...NOTE: There is no overdrive persay, it's just that the 6th gear ratio is 0.69:1 and 5th gear is 0.86:1


(owner's manual) Don't have one -OR- would like a digital, searchable desktop document?.

 

It keeps in in lower gears for longer periods and will downshift automatically when going down hill. Older trucks had a similar switch to lock out OD, but that is all they did. When engaged the truck may well not shift into 6th, and rarely even 5th if under a heavy load.

Any ratio less than 1:1 is overdrive.

 

Maximum Overdrive.... when the machines take over. No this ain't Terminator LOL

 

T'is true, however, was referring to the fact that there is no OD lock-out switch that was previously available (that you noted). MEANING: Enabling Tow/Haul does not disable/lock-out 5th or 6th gears.
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Was towing my 27 ft. travel trailer the other day in Tow/Haul mode, and using manual shift, locked out 5th & 6th gear. RPM's kept about 2200 or so and truck ran very well. I also got right around 14mpg too. I did have the MPT 87 Performance Tow w/No Trans Tuning installed. I liked it.

 

I have read the information in the manual; I have also read other websites about it.
I have a 2013 Ford F150 XL with a 3.7L V6 and a 6-speed transmission.
I live near Las Vegas, NV and I'm driving through mountains quite often.

My experience with TOW/HAUL enabled:

1. It keeps the truck from "running-away"/up-shifting when driving down a mountain or steep hill.
2. The catch: Along with #1, it will sometimes downshift during this and make the engine scream --- it would be holding the speed just fine and then it does this unnecessary downshift. I immediately hit the button twice - to turn this horrible mode off and then back on. I don't know what he engine can really handle but downshifting to 2nd at 40 or 50 MPH doesn't sound good.
3. When using it while towing... at least on the highway, all it seems to do is severely lower my MPG. However, in town, maybe it does help with the reduced number of shifts.
4. It will sometimes prevent my truck from shifting... it seems to get "locked" in 3rd or 4th and won't change. I turn it off or turn it off and back on and then it starts shifting normally again.

This transmission had a recall for a programming issue where someone would be driving along and it would suddenly downshift to 1st. My truck has done this once. I made a quick and probably-too-fast u-turn on a divided 4-lane road... it was the entrance to a golf resort and no one was around. After making the u-turn, and going just a short distance, maybe 30 or 40 feet; it downshifted to first and would not change gears. No matter what I did with the gear shift..
I dropped it in Neutral and stopped. I took off again in Drive, it still was stuck in 1st.
I stopped again and put it M/Manual. I took off in 1st and tried to upshift, it was stuck in 1st.
I put in in Neutral, shut off the truck and then restarted the truck and it resumed shifting normally.
That was 2 to 3 years ago and it hasn't done it since.
I mentioned the recall. The recall described exactly what happened to me. However, that recall did not cover 2013 models.