Researching swapping th400 with a 4L80e (rather than GV) lead me here, seems like a great deal of knowledge here. It's an 83' G30 Winnebago guadra-bog w/5k on rebuilt 350, thinking a late 90's 4L80e (w/the aft cooler line)and an aftermarket shift module. As it's a Camper and want to have fun...