TH400 Fluid Leak. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

eightbanger · 06-24-2008, 03:07 AM

Man I don't know what I would do without you guys and this forum, just talking to someone who knows makes me feel better and not feel like all is lost. I'll go the plug the leak point route for now and see if that works, so thanks for that Jay & Jim but your right PanelDeland I was looking at OD for sometime soon if the finances allow problem is I want to keep my TH400 and add a Gear vendors unit. I'll start Googleing the length and breadth of Britain to see if there is anyone here who knows how to repair and rebuild these Transmisions.
Thanks again for your help you guys.

eightbanger · 06-24-2008, 01:30 PM

Well I sanded and cleaned the seam on the trans case were I think ithe crack is and spread a lot of Bondo over it, when I was in there I noticed what looked like a sheared off bolt near the top of the case, could not get my head any closer to see properly so put the camera up there and took these pics to get a better look. And there was trans fluid weeping out...so this was the source of my leak all along not the gasket, and not a cracked case...phew! so I have gunked it with Bondo also.
So can anyone tell from the pics what should be there? the second pic is to give you an idea of where this thing is.

06-24-2008, 03:07 AM	#1
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Re: TH400 Fluid Leak. Man I don't know what I would do without you guys and this forum, just talking to someone who knows makes me feel better and not feel like all is lost. I'll go the plug the leak point route for now and see if that works, so thanks for that Jay & Jim but your right PanelDeland I was looking at OD for sometime soon if the finances allow problem is I want to keep my TH400 and add a Gear vendors unit. I'll start Googleing the length and breadth of Britain to see if there is anyone here who knows how to repair and rebuild these Transmisions. Thanks again for your help you guys. __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger Last edited by eightbanger; 06-24-2008 at 12:30 PM.

06-24-2008, 01:30 PM	#2
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Re: TH400 Fluid Leak. "UPDATE" with pics. Well I sanded and cleaned the seam on the trans case were I think ithe crack is and spread a lot of Bondo over it, when I was in there I noticed what looked like a sheared off bolt near the top of the case, could not get my head any closer to see properly so put the camera up there and took these pics to get a better look. And there was trans fluid weeping out...so this was the source of my leak all along not the gasket, and not a cracked case...phew! so I have gunked it with Bondo also. So can anyone tell from the pics what should be there? the second pic is to give you an idea of where this thing is. __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger

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