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Old 09-09-2014, 09:55 PM   #26
davepl
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Re: TH400 pan still leaking!

Quote:
Originally Posted by mechanicalman View Post
Or, take the advice of someone else who has went through 4 gaskets and 2 pans and never fixed the leak and had to hire someone to fix it for him.
Post a picture of your truck, I'll post one of mine. We'll see who the real mechanic is.
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Old 09-09-2014, 10:44 PM   #27
Grumpy old man
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Re: TH400 pan still leaking!

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Originally Posted by davepl View Post
Post a picture of your truck, I'll post one of mine. We'll see who the real mechanic is.
Well...There goes the neighborhood !
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Old 09-09-2014, 11:00 PM   #28
davepl
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Re: TH400 pan still leaking!

Everybody knows I'm the toughest stranger on the Internet :-)
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Old 10-04-2014, 09:27 PM   #29
gmebey
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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?

Last edited by gmebey; 10-04-2014 at 09:28 PM. Reason: Spelling
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Old 10-04-2014, 09:29 PM   #30
leddzepp
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Re: TH400 pan still leaking!

Weld the pan on there. It will never leak again.
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Old 10-04-2014, 09:37 PM   #31
gmebey
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Re: TH400 pan still leaking!

Wow. That may work. Lol
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Old 10-04-2014, 10:13 PM   #32
cwilkie
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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.
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