Originally Posted by 21C1
Here are my two cents. Put the truck in tow/haul mode and go. Concentrate on keeping everyting between the lines on the pavement and dodging the less than capable drivers out there. Let the transmission do what it is designed to do...shift! In my '10 F150, tow/haul mode does not lockout 5 or 6th gear. The manual also doesn't state anything about locking out either gear. I think you can only lock out 4th though 6th by selecting 3 with the lever. If Ford Engineers what 6th gear locked out they would have programmed tow/haul to do just that.
Gas milage might not be pretty but it has to be better than my 5.4L pulling 9000#. On a really bad day I see 7 mpg on the highway. On a good day on the highway I might see 9 or 10mpg. I am not complaining, that 1/2 ton pickup is towing a gross combined weight of about 15,500# down the highway at 65 mph. Don't even look at the mileage just fill up when it reads empty and enjoy camping in the new rig!
Thanks 21C1. I learned a lot by (finally) reading the F-150 owner's manual and talking with the Ford rep this morning.
You're right about the Tow/Haul mode. By going there, the tranny will automatically select the appropriate gear, although it could make the tranny work harder by changing frequently between the three overdrive gears (4, 5 & 6).
The tranny is an SST which allows the driver a second tow option to shift from D (Drive) Tow/Haul mode to M (Manual) mode with gear lockout provisions. (I was wondering what that 'M' meant on the shift select panel.
In the 'M' mode, 6th, 5th, and/or 4th (overdrive) gears can be locked out as desired/necessary for hills/steep upgrades. It also allows to select gears manually using plus/minus buttons.
The Ford guy said with the 3:15 gears, I'll probably use O/D lockout options more than the guys with 3:55 or 3:73 rears and will probably gas up more often.