mkirsch wrote:
There's no point in wasting time with a shop until it won't move anymore. All a shop is going to do is put the truck up on a rack, LOOK (visually) at the transmission, say "Yup, it's a transmission. Looks fine," and charge you a few hundred dollars for the privilege.
If nothing is sticking through the case, there's nothing a transmission shop can "look" at without pulling the transmission and tearing it down. You're not going to want to spend that kind of money and not rebuild the transmission, which means even more money...
Flush and fill with a new filter might be prudent as the mileage is still low enough that flushing and filling may still do more good than harm. Other than that, run it until you see a pile of parts and/or a puddle emerge from under the truck.
You need to find a new shop if that is how they treat you! Wow.