Is there any adjustment on the cruise control on 2008 Expeditions? Mine wants to shift down even on small grades with or without a trailer traveling at 60-65 MPH. If I control the speed with the gas pedal I can maintain speed without it shifting down on the same hills. Help.

 

3.31 axles? I get the downshift infrequently on "slight grades" with my 3.73 gears. But on normal interstate driving I notice my wife's Honda downshifts on the same "steeper" grades that the truck does.

I haven't seen transmissing tuning offered.

-- Chuck

 

If you are running larger tires that will make it worse.