i have a 63 chevy II nova, all original, with a 2 speed standard powerglide tranny. for some reason, it has started to leak tranny fluid out of the odometer gear housing like where the speedometer cable goes in. the car has not been started in months. kind of strange to me. so i had another odometer gear housing from a 3 speed tranny, and now it is leaking in the same place. anyone have any words of wisdom about this, and why all of a sudden it is leaking. have had the car for years, and it was fine.