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#26 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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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.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#27 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: TH400 pan still leaking!
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#28 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: TH400 pan still leaking!
Everybody knows I'm the toughest stranger on the Internet :-)
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#29 |
Registered User
Join Date: May 2011
Location: Fort Collins, Colorado
Posts: 95
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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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#30 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,005
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Re: TH400 pan still leaking!
Weld the pan on there. It will never leak again.
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__________________
1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#31 |
Registered User
Join Date: May 2011
Location: Fort Collins, Colorado
Posts: 95
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Re: TH400 pan still leaking!
Wow. That may work. Lol
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#32 |
Chance
![]() Join Date: Sep 2001
Location: Belcourt ,ND, USA
Posts: 750
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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.
__________________
1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400 |
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leak, pan, th400 |
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