ok guys im in bad need of help. i have taken a 2wd 727 that was working fine when i pulled it out and changed out the output shaft because i needed a good 4wd tranny and there was nothing wrong with with it as a 2wd. after i put it back together i cant get it to stop blowing fluid out the front somewhere under acceleration. i have changed gasket and seal on front pump and front seal and it still does it. so if you guys can help please do i have pulled this thing 3 times and its not fun i dont wanna have to do it again.

 

is it coming from out of the bell housing or where the bell housing goes connects to the transmission. you could have pinched the gasket.
If it was coming out of the hole behind the tin cover that is the vent so for some reason it's building up pressure internally. Try checking your trans. cooler and lines for a restriction. that's the only thing off the top of my head that I can think of that'll make it blow fluid out of the vent. If there is no vent problem check for a crack in the case or front pump.

Take a photo and post it here for assistance. The vent is inside the bell housing and at the top of the trans case, not likely the source of your leak. More likely the shift shaft seal or neutral safety switch seal or fluid cooling line or pan gasket.