My husband has the newer style on his 99 F250. They are diferent sizes.
I am not sure if they are interchangable, but here are my thoughts on the matter. Since they don't seem to be the same, I am betting that they are not. If it works, don't fix it. Since your dad is accustomed to that particular style it may be better to stick with what's familiar. Some of us that aren't kids any more may have difficulty when the car is the same but the buttons are not. You may waste money by purchasing something that you are not sure will work. Buy a spare.
Kate
| > This number is the same on all four of my remotes. Two are from my 95 GT | two | > from my 98 Cobra. | > The one you want will look like this: | >
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| > However. On my 95 the remote had a raised Pony on the face of the remote, | on | > the 98 it did not. | > The face was the only thing that changed. When I got the new remotes, I | just | > changed the faces from one to the other so I could keep the Pony. | >
| > Hope this helps you :-) | >
| > Kate | >
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