I purchased the speedo programmer about a year ago, to adjust my old 04, then stashed it away. Soon after, traded the truck in. When I went to use it on my new truck after getting bigger tires, no joy- "Vehicle Mismatch". Hypertech tech support was kind enough to tell me that since I did not return my old truck to factory default prior to getting rid of it, the programmer no longer works. They were also kind enough to offer to "reset it" for a reduced cost of $130.00. Well, guess I will just pay Ford to do it. Note to self- sell truck, clear program!