ATF leak from connector?

[chris85]

4l80e.

I’ve lowered the drivetrain a few times, enough where fluid leaked out the back, to get a crossmember and the TC assembly all built and I noticed fluid along the rim of the pan and built up around this connector. Figured that’s just where it all ran down, but there is actually fluid in the connector. I can’t tell if it’s coming out from here or just collecting. Trans has been rebuilt but hasn’t driven yet. Not sure what to do here.

 

[frankin5]

@Greg Ducato

 

[Abusfullofnuns]

There are plastic tangs inside the case that hold the connector in place and it’s sealed by an o ring. From what I remember reading when I thought I was having 4L80E issues, they rarely leak unless high mileage. When they do leak they should be replaced, and are not that bad to change. I also remember reading that ones that leak have either been reused after a rebuild or the connector isn’t fully seated for one reason or another. If yours is leaking through the pins and not the outside. I would have to guess the bulkhead is broken and not the o ring. I’m sure Greg will be along to provide the correct info eventually.

 

[Abusfullofnuns]

Can you move the plug at all? That would probably tell you if it’s seated and latched.

 

[chris85]

Can you move the plug at all? That would probably tell you if it’s seated and latched.

When I removed the plug the connector seemed pretty solid in there but I didn’t do much inspection.