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.

92 Bonnie won't shift into overdrive

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Old 04-14-2009, 10:08 AM
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Default 92 Bonnie won't shift into overdrive

The gas mileage has started to suffer. My wife, who drives this car, noticed the OD is not kicking in. It does not seem to even try to shift. The problem seems to be intermittent as half the time it will go into OD. Fluid level is up and looks bright red and smells fine.

Is this possibly a vacuum leak somewhere? Any ideas?
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