The vehicle speed sensor in Your 2007 Ford F-150 is answerable for sending information to the transmission to control the planning of stuff changes and moving. Assuming that one of the sensors turns sour You will see unpleasant moving or unexpected flooding of the tranny,and the "actually look at motor" light will enlighten. The vehicle speed sensors of the F-150 are introduced on one or the other side of the front of the transmission,open from under the vehicle. The right-sided sensor ought to be found behind the truck's radiator flood. The left-hand VSS is put beneath some little transmission lines. Changing out either requires a 1" profound well attachment. Cost to have an expert technician supplant the VSSRanges from $130-$250 in parts and work.