Fresh Rebuilt 904 locked up

..............Ur 904 wont take 12 quarts..........no more than 9 with converter full, so u need 2 talk 2 them...............how far did u tow it with the drive shaft on?........how fast did u tow it?......the output shaft could of seized it the rear of the case.........take off the drive shaft and see if u can turn it with the yolk still in the trans.......kim........