I'm thinking about ditching the SM465 and going with a TH400 instead. My question is, what kind of trucks did these trannys come in? Was the TH400 ever offered in a half ton truck? Did Blazers ever come with a TH400 from the factory? I just need to get an idea of which trucks I need to look for that might have a TH400. Never put a stupid move passed a stupid person.