Bill,
Amarillo is a nice sized city and should have some good resources. I'd stop by a few of the local independent mechanic's shops and ask them who they use for tranny repairs, because they don't do tranny work themselves. Nine times out of ten there'll be one local shop that all the shops use, often even the dealerships. That's the way it is here, a little hole in the wall tranny shop that's been around for years. Go to that shop, let him do a checkup on your tranny, and go from there. Stay away from the "names" that spend their money on advertising.