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Re: Selecting a new Transmission for Chevy c50 bus by Todd
My 4 speed hasn't gone out, but like you, I would like to bring my rpms down. I turn 3600 at 60. It doesn't run hot and holds about 60 lbs. oil pressure at that speed, but I figure if I can lower the revs I'll add life to the engine. Someone told me a 4 speed and 5 speed will swap out if the length of the output shaft is the same.