Leaky 3speed AT - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bmartin9122 · 06-05-2006, 07:09 PM

Hey guys,

I had my tranny rebuilt in January, and a big concern at the time was the significant transmission fluid leak. I know a small leak comes with the territory, but this was enough to cause me some real concern.

Anyways, the shop who did the rebuild has had a devil of a time stopping the leak(s?)!!! First, they replaced the pan gasket. Then, they thought the pan had been over-torqued damaging the new gasket. Next, they figured the orignal pan was warped and replaced it with a new, aluminum deep-sump pan. Later, it was thought the mating surface on the old tranny was warped, so they ground it flush. After some more research, they discovered a hairline fracture in the housing and welded it closed. The last word was they thought the mating surface was still slightly warped and needed some more grinding.

I've seen some ideas like a possible leak from a kick-down cable or overflow from the fill tube itself. Are their any other ideas as to where the gremlin may be hiding???

Thanks!!!

-Bryan

06-05-2006, 07:09 PM	#1
bmartin9122 Registered User Join Date: Jan 2006 Location: Texas Coastal Bend Posts: 169	Leaky 3speed AT Hey guys, I had my tranny rebuilt in January, and a big concern at the time was the significant transmission fluid leak. I know a small leak comes with the territory, but this was enough to cause me some real concern. Anyways, the shop who did the rebuild has had a devil of a time stopping the leak(s?)!!! First, they replaced the pan gasket. Then, they thought the pan had been over-torqued damaging the new gasket. Next, they figured the orignal pan was warped and replaced it with a new, aluminum deep-sump pan. Later, it was thought the mating surface on the old tranny was warped, so they ground it flush. After some more research, they discovered a hairline fracture in the housing and welded it closed. The last word was they thought the mating surface was still slightly warped and needed some more grinding. I've seen some ideas like a possible leak from a kick-down cable or overflow from the fill tube itself. Are their any other ideas as to where the gremlin may be hiding??? Thanks!!! -Bryan __________________ 79 GMC Sierra Grande K15 --PPG paint code 62608 Sunburst Orange Metallic (WA802K) --Gentex auto-dimming rearview mirror model K31 --Carriage Works billet grille model 40071 --Go Industries 2.5" tubular stainless headache rack --Sylvania Silverstar sealed headlights model H6024ST --Texas Saddlebags center console model 101 --Brown's Welding class IV V-5 pipe bumper --Ramsey RE8000 winch --33" tires Last edited by bmartin9122; 06-05-2006 at 07:10 PM.



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