I don't mean to "burst your bubble", so to speak, but what you've done will not have any effect on your top speed limiter. Your limiter is set at anywhere from 98 to 108 mph from the factory, and is set to match the speed rating of your tire and wheel combo, as equipped from the factory. So it's easy for a V-6 F-150 to do 105 mph or more, and it's easy to have a V-8 that won't exceed 98 mph. The top speed limiter is a completely different function from the rev limiter, and will work in any gear that will allow the vehicle to reach that speed, so whether the vehicle is in Overdrive or not doesn't matter, the top speed limiter is still functioning.
And your local Ford dealer cannot remove the top speed limiter either, unless they are dealing in aftermarket products, such as a Superchip or Hypertech or what have you.
Our bests to all,
Performance Products, Inc.
National Distributor of Superchips