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  1. Jellymule79

    What fluids to run?

    Ok... Recently purchased an 04 FLHTC. It has stage 2, V&H true duals, and an Ultima 6 speed transmission. The previous owner was running Amsoil 20w/ 50 full synthetic in crankcase, tranny, and primary. 4th and 6th gear whine. I'm looking for suggestions on what oils to run. I'm not a motorcycle...