overdrive problem - 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 05-08-2006, 04:58 PM   #11
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Quote:
Originally Posted by NCCamper
Ok. I understand I think. I am just hoping it is an ignition issue, and not the torque converter itself going south. What if you are going around...say...55 MPH...and in OD and the TCC in locked position, and you start up an incline? Does it do the same thing? Does it do it under both warm and cold operating temps?

Thanks,
John
John, what you are describing is a classic ignition issue. 95% of the time, that'* what these symptoms point to. The other 5% are transmission issues.
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Old 05-08-2006, 05:11 PM   #12
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WIllwren,

I am sure you are right. If I made it seem otherwise, it wasn't my intention.

Thanks!
John
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Old 05-08-2006, 05:12 PM   #13
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Quote:
Originally Posted by NCCamper
WIllwren,

I am sure you are right. If I made it seem otherwise, it wasn't my intention.

Thanks!
John
Wasn't questioning that. I assumed you were asking based on your own symptoms.
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Old 05-08-2006, 05:21 PM   #14
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Willwren,

I did think of my car at first, but my symtoms were only somewhat like what he is describing. I really was just asking a few clarifying questions. My shudder was very intermittent, only lasting a second or two, on an incline in OD and TCC. He said his was ongoing until he drops it into 3rd gear, though. Fortunately, my problem was corrected with a new valve body, TCC solenoid, and trans pump. The TC was fine. I am sure he will find that his issue is ignition-related, as most folks have suggested.

Thanks,
John
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Old 05-08-2006, 10:57 PM   #15
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the problem is constant and will not go away untill i let my foot off the gas...and there was a point where it began to do it in drive but that only happened once or twice...but im going to try and look at everything asap but the only problem is that im up at school and dont have the tools to do so, so everything is going to have to be visual untill next week when i get it back home...thank you guys i really apreciate all of the help because i originally was under the presumption that i would be doing a tranny overhaul (u guys may have saved me a few grand lol!!)
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Old 05-10-2006, 12:09 AM   #16
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i also suffer from the shudder you describe.
it seems to start as OD is engaged and leaves after you jump over 50mph.
it wont or happen lightly under light load.
it doesnt happen when in drive.

tires dont have over 6,000k since they were last balanced.
the wires and plugs are few months old only.
im going to try replacing the coils and swicthing to 8.5 or 8.8 mm wires.
ill get the tires rotated and balanced again.
i want to get new coils but all i can find in stock is accell or bosh.
anything else they have to order.

whats the product number for L27 mds coils?
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Old 05-10-2006, 09:13 AM   #17
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Quote:
Originally Posted by 94BonnieSE
im going to try replacing the coils and swicthing to 8.5 or 8.8 mm wires.
Please be aware that larger wires are only more insulation on the outside of the wire core. This is why AC Delco uses a 7mm wire and they last for 100K+ w/o problems.
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Old 05-10-2006, 10:17 AM   #18
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BillBoost37
Quote:
Please be aware that larger wires are only more insulation on the outside of the wire core. This is why AC Delco uses a 7mm wire and they last for 100K+ w/o problems.
im trying to make them heat up less. I think that bigger wires or more insulated
wires should heat up less.

I have recently started to work, and each morning i do about an hour in stop n go
traffic on the highway.
before the 180* stat my engine temp was always rediculous high.
I think that this could affect the wires conductivity but i am not sure.

thats the reason why i want bigger wires.
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Old 05-10-2006, 10:28 AM   #19
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Wire insulation size has nothing to do with the absorption of engine bay heat etc. Wires are specifically made to deal with engine bay temps easily. About the only heat under the hood that hurts them is laying directly on an exhaust manifold.
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Old 05-10-2006, 12:24 PM   #20
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ahh k! thats good to know.



can coils be affected by heat?
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