2010 F150 shifting problem
Posting Guru
Joined: Nov 2009
Posts: 2,016
Likes: 3
From: NC
Have you guys read your owner's manual?
<snip>
Tow/Haul delays upshifts to reduce frequency of transmission shifting.
Driving with a 6–speed automatic transmission
Your vehicle has been designed to improve fuel economy by reducing
fuel usage during coasting or deceleration. When you take your foot off
the accelerator pedal and the vehicle begins to slow down the torque
converter clutch locks up and aggressively shuts off fuel flow to the
engine while decelerating. This fuel economy benefit may be perceived
as a light to medium braking sensation when removing your foot from
the accelerator pedal.fuel usage during coasting or deceleration. When you take your foot off
the accelerator pedal and the vehicle begins to slow down the torque
converter clutch locks up and aggressively shuts off fuel flow to the
engine while decelerating. This fuel economy benefit may be perceived
as a light to medium braking sensation when removing your foot from
Towing my bassboat over a steep hill this weekend I too noticed the rapid downshift once you hit the brake pedal. It seems to me like when it is in tow/haul the computer senses when you are off the gas and braking and down shifts to improve breaking. The concept is good and with modern computers/sensors in these vehicles this could improve towing performance. It will take some getting used to. I am thinking about getting a programmer so I can play with some of the shifting options.
D (Overdrive) with Tow/Haul On
The Tow/Haul feature improves transmission operation when towing a
trailer or a heavy load. All transmission gear ranges are available when
using Tow/Haul.trailer or a heavy load. All transmission gear ranges are available when
<snip>
Tow/Haul delays upshifts to reduce frequency of transmission shifting.
Tow/Haul also provides engine braking in all forward gears when the
transmission is in the D (Overdrive) position; this engine braking will
slow the vehicle and assist the driver in controlling the vehicle when
descending a grade. Depending on driving conditions and load
conditions, the transmission may downshift, slow the vehicle and control
the vehicle speed when descending a hill, without the accelerator pedal
being pressed. The amount of downshift braking provided will vary based
upon the amount the brake pedal is depressed.transmission is in the D (Overdrive) position; this engine braking will
slow the vehicle and assist the driver in controlling the vehicle when
descending a grade. Depending on driving conditions and load
conditions, the transmission may downshift, slow the vehicle and control
the vehicle speed when descending a hill, without the accelerator pedal
being pressed. The amount of downshift braking provided will vary based
to you!
Thanks Teacher! 
Junior User
Joined: Jan 2010
Posts: 80
Likes: 0
From: Mississauga, ON, Canada
Overall, my transmission seems smooth, however I've managed to adapt to this adaptive transmission
by giving it time to do all it needs to do. Unfortunately, that even includes easing off and back on the gas regardless of my needs. Spirited driving and returning back to normal driving gets me every time and that's when things get audibly clunky. 
Expecting instant reactive/adaptive response from this transmission will lead to nothing but frustration - I'm reminded of my sister's 80s Topaz back in the day. They claim it's done in the name of fuel economy and since I'm moderately happy with the fuel economy, I may have to wait another decade for mechanicals/electronics to cooperate the way they should (and not just once, but reliably and at production volumes across 200,000 similar vehicles - it seems like a statistical impossibility)
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