Yep, its an AW4, but I wouldn't consider that mileage low
According to my records, you had 154K on it in March of 2007....what does it have now?? 170?? THats a lot of miles. Even a tranny as good as the aw4 is going to wear out eventually
Honestly, the AW4 is one of the best autos that we ever used...the only thing i can think of is maybe the wrong fluid was used when it was flushed, either that, or a valve body issue. Really, when I have an AW4 come in shifting funny, with that kind of mileage...I order a new one
