OD lockup question - 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 12-14-2004, 11:46 AM   #11
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Reference the service bulletin DrJay posted in that 6-page thread... GM recognizes there have been cases of a "chuggle" that results when the TC locks and unlocks under load. I realize yours is completely unlocking and staying that way, but it may still be related to that same issue. The service bulletin indicates that the problem can be fixed by recalibrating the TC lockup parameters in the PCM. What do you think? I'd say its worth a try, unless you're fairly confident the problem lies elsewhere. It sure is cheaper than a new torque converter.

I was intending to have this issue addressed on my own car, but was plagued with other technical issues. Now I have an Intense PCM waiting to go into the car, and I'm betting that it will cure my surging/chuggle. Based on some of the computer problems we've had with our Olds 88 I have a "feeling" that I'm barking up the right tree. We'll find out how good my instincts are in a week or so!
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