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B10 transmission leak

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Oil is leaking out the back of the transmission where the shift shaft goes in and out. I can't see a seal on the outside-------what is supposed to seal the oil in the case???

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All of the older ones do this, that is if they get used. The newer designs had seals on both ends, I think that started with the 'running board tractor' era. Dan

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This is normal for the 3 speed transmissions on the early b series. The b 110 had a seal the rear but not on the front. The reason they don't have a seal in the front is so that the gear case can have a breather for when the oil expands when it gets hot. On my b 12 I bored both sides of the housing and put seals in both sides then I put a breather cap in the top fill plug on the transmission housing. This now allows the gearcase to not leak oil but still vent without making a mess.

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