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Recent content by Pontoonmans1971

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    Tranny fluid on a Detroit 671

    I have a Detroit 671 marine engine with a Allison transmission. Every time I run it I lose fluid in the transmission. I mechanic told me to use street 40 wait oil in the transmission just like the engine. It’s a 1953 engine. Could that be the reason I’m losing fluid is that I haven’t been using...
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