Not really, it said the main differences are internal. I know what the tranny is not, it is not a 727, which the guy I bought it from said it was. I have narrowed it down to a 904 or 999, but I can't tell the difference between the two. That page didn't have any sort of listings about the numebrs on it. If I had some sort of measurements to go off of that might help but I can't find anything like that either. The cases might even be the same, however the 904 is light duty and the 999 is medium duty. The numbers right now are all I have to go on, unless I can find a way to differenciate between the 904 and the 999. I am going to have to try to call the dealers tomorrow and see if I can find anything out. Meantime if anyone can tell me what I have, it would be appreciated.