Re: TH400 pan still leaking!
 

Post a picture of your truck, I'll post one of mine. We'll see who the real mechanic is.

Re: TH400 pan still leaking!
 

Well...There goes the neighborhood !:haha::drama::m7::exit:

Re: TH400 pan still leaking!
 

Everybody knows I'm the toughest stranger on the Internet :-)

Re: TH400 pan still leaking!
 

Update.

I cleaned off the tranny and look closer for the leak. There is two, governor cover and the tranny pan along the front. I removed the pan and checked the flatness...... It is not flat and has about a 1/64 to 1/32 gap between a couple of the bolt holes.

Hmm a cheap cast pan = leak!

Any thoughts on Moroso 42020 pan or similar?

Re: TH400 pan still leaking!
 

Weld the pan on there. It will never leak again. :lol:

Re: TH400 pan still leaking!
 

Wow. That may work. Lol

Re: TH400 pan still leaking!
 

Mine would slowly leak out a lot of fluid if parked for a long time. I changed the gasket and pan numerous times. It turns out the shaft of the speedo hear was hollow all the way through. That little pin hold caused it drop out of the cable and onto the pan. After I changed speedo gears it didn't leak again. That was my th409 leak experience.