The Stovebolt Site Forums The Shop Area Driveline th350 major leak

I've got a th350 in my '40, and after sitting all winter I had a giant puddle of tranny fluid all over the garage floor. It had a leak when I got it, but it wasn't too bad. I replaced the dipstick tube and o-ring, as well [censored] the pan gasket. But the leak persists and is getting worse. It's hard to tell exactly where it's coming from, because it seems like there is fluid everywhere on the bottom of the tranny, so it's been had to track it down. I took it out yesterday, and just backing out of the garage to the driveway left a steady line of fluid on the ground.

It looks like it might actually be coming out of the small hole at the bottom of the flywheel cover, but it's hard to tell because it seems to be getting everywhere, but I definitely saw a drop come out of that hole. I haven't removed the flywheel cover yet to see what it looks like, but anyone have any idea what I might be dealing with, if that is in fact where it is dripping out of?

It's not unusual for transmissions to leak after sitting for extended periods. The oil from the torque converter will seep into the trans find a way to leak out. It's usually the front pump seal if it's leaking in the area you indicated. Don't panic however, clean it up, drive it, and you may find it's OK.
Fred

There are also o-rings on the speedo gear and the modulator. Inexpensive and easily fixed. I just learned that there is a vent near the top of the case on a turbo 400, bet the 350 has one also. Being clogged up will make fluid leak also-I am told. Makes sence-too much pressure.