98 Bonneville Transmission Overflow - Page 2 - 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 12-11-2009, 10:19 AM   #11
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That'* what I originally told the mechanic, just replace the seal. They told me just doing the gasket would be $2500. Only 400 less than a full rebuild.

That number seemed a little high to me.

Going to a transmission repair shop today to talk to them and see what options there are.
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Old 12-11-2009, 11:19 AM   #12
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The mechanic doesn't want to do the work. I have a buddy who is one and I do a lot of side work myself. It'* common that if you don't want a job, overprice it. Then the customer will usually find a better price, if they did decide to have you do it. Then it would be well worth your time.

A trans shop would probably take 1-2 hours to get it out, 1-2 hours to fix the issue and 2-3 back in and road testing. On the high side I figure that at 7 hours of labor. Anything over $700-$1000 is overpriced IMO.
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Old 12-12-2009, 06:52 PM   #13
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It sound like it blew a channel plate gasket, which, if it is the only issue, can be fixed with the trans in the car. You will have to lower the engine cradle and support the engine.
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