Make sure that the shop filled the transmission correctly. There is a pretty involved process of warming the trans up, shifting through all the gears, letting it cool down, standing on one leg, reciting the alphabet backwards all while wearing a brightly colored clown wig.
OK, maybe not all that, but there is a very specific set of steps that have to happen to make sure that the fluid is topped off. Other members have had their transmissions fail because these steps weren't followed by the shop they used.
The instructions may be in the how-to section, or maybe someone who has them on hand will post them up.....if you need them.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless