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.

Fix for 1997 Tranny surge at highway speed

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Old 08-12-2005, 06:41 PM
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so you could get a 97 SC with an MN3 also?
Old 08-12-2005, 08:50 PM
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I'll reconfirm, all 97 models with the L36 got the 4T60.....

Again, is there any possibility that this problem is exacerbated by high heat conditions? I don't want to get something fixed that isn't the true source of the problem.
Old 08-12-2005, 10:38 PM
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I can't say for sure, but I'd do the test on a hot tranny (while the problem is occuring) and see what the results are.

TO VERIFY THE ABOVE CONDITION, PERFORM THE FOLLOWING TEST: DUPLICATE THE CONDITION AND NOTE THE TCC SLIP ON THE TECH II. THE SLIP WILL RANGE BETWEEN 50-150 RPM. NEXT, COMMAND THE TCC ON WITH THE TECH II. THE DUTY CYCLE SHOULD READ 99% AND THE VEHICLE SURGING CONDITION SHOULD NO LONGER BE EVIDENT. IF THE ABOVE TWO (2) PARAMETERS ARE MET..........SEE THE FIRST POST ON THIS TOPIC FOR RECOMMENDED REPAIR.
Old 08-13-2005, 01:41 AM
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So either I need to take ol' Bonnie to the dealership or buy myself a Tech II? Hmmm... I'll opt for the former, lol.

How labor-intensive is this fix for a dealership? Is this a "pull the tranny and disassemble it" kind of deal, or a relatively simple task? Translated: Will this cost me my firstborn?
Old 08-13-2005, 08:25 AM
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Well the bulletin says the job pays 3.5 hours under warranty, so you can use that to negotiate but they will probably try selling it for about 5 hours. The control vavle body is probably between 150-300?
Old 08-13-2005, 09:51 AM
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You don't need a tech II to simply read TC Slip. Most scantools will do it. And if I recall, you can command the TCC with a switch applying 12V to a pin on the trans connector.
Old 08-13-2005, 11:49 AM
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Originally Posted by willwren
You don't need a tech II to simply read TC Slip. Most scantools will do it. And if I recall, you can command the TCC with a switch applying 12V to a pin on the trans connector.
I knew I could read TC slip with a scantool, but I didn't know I could command TCC full apply by alternative means. Can you find a procedure for this anywhere?
Old 08-13-2005, 01:04 PM
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hrm.

replacing the valve body... that'* not something I think too many peeps here are interested in doing. expensive... very expensive. unless you do it yourself.

anyway, seems like this should be covered for everyone, as it'* obviously a problem we *all* have.

then again, so'* the upper intake, so...
Old 08-13-2005, 08:36 PM
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What kind of skills are needed to do this procedure yourself (i.e. do you need to be a tranny guy)?
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