Transmission leak

[murguia]

Rebuilt a th350 and installed it. Before I installed it I noticed the O ring on the end of the fill tube was sticking out and ripped so we replaced it with a new one and stuck it back in.

Filled it and I started noticing it leak when I park on the street and it’s leaning to the right a bit. Then when I park it in my flat garage it doesn’t leak. Looks to be leaking out of that end of the fill tube area. Tried to get pictures.


Weird though, when I was under the truck the fill tube looked a little moist about a foot up…


Any ideas what my best option to fix would be?

Doesn’t leak when flat

Pan doesn’t leak