Re: TH400 pan still leaking!
Mine would slowly leak out a lot of fluid if parked for a long time. I changed the gasket and pan numerous times. It turns out the shaft of the speedo hear was hollow all the way through. That little pin hold caused it drop out of the cable and onto the pan. After I changed speedo gears it didn't leak again. That was my th409 leak experience.
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1968 Chevrolet Stepside
BB 396 w/TH400
1972 Chevrolet 3/4 Ton 4x4
BB 496 w/TH400
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