Leaking transmission fluid - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-22-2004, 01:26 AM   #1
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Default Leaking transmission fluid

My 94 SSE is leaking transmission fluid. The only thing I think this could be is a bad gasket. But, I can't find much information on the forum about tranny leaks. Is this a common problem? How else could it be leaking? Thanks
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Old 01-22-2004, 01:29 AM   #2
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Default Re: Leaking transmission fluid

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Originally Posted by doug
My 94 SSE is leaking transmission fluid. The only thing I think this could be is a bad gasket. But, I can't find much information on the forum about tranny leaks. Is this a common problem? How else could it be leaking? Thanks
Common leaks are as follows:
Pan Gasket.
Side Cover Pan Gasket.
Transaxle Seals.
Oil Cooler Lines.
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Old 01-22-2004, 02:01 AM   #3
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Default Re: Leaking transmission fluid

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Originally Posted by DeathRat
Common leaks are as follows:
Pan Gasket.
Side Cover Pan Gasket.
Transaxle Seals.
Oil Cooler Lines.
Well I know the pan is like an oil slick, does that help at all in figuring out what'* leaking?
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Old 01-22-2004, 11:22 AM   #4
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The bottom pan gasket IS THE most common leak though. try washing it off & then re-tighten the pan bolts first. These bolts sometimes loosen off with road vibration. If that doesn't solve it, then replace the gasket & filter (while you're at it). The gasket from GM is rubber with a metal insert. It was designed to be re-useable.
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