This sounds about right coming from the ford dealer. My dad had to get his TC replaced at about 30k on his Town Car and went ahead and asked for the fluid and filter change as well. He double checked with the monkey up front that they weren't going to just do a suck job and he said sure, filter change too.
When he brought it back there was nary a hint of fluid anywhere near the trans pan so I became suspicious. I dropped it and sure enough, original filter. The pan magnet was useless as it had five years worth of metal shavings completely covering it and the pan itself was almost black with scorched fluid. I did the filter change and went back to the dealer. He said, oh yeah, well it had low miles so we recommend not changing the filter, just doing a flush.
When I showed him the owner's manual that calls for a fluid and filter change every 30k he kind of passed it off as "Well, it's not under warranty so..."
Then I showed him the paper where he charged my father 130.00 for a filter change and he turned white. I threatened legal action and I got the cash back, plus a new battery in exchange for the aftermarket filter I had to buy.
Bottom line is, my Ford dealer's a crook. Don't trust yours unless you want to.