I have lost my over drive but only when warm FIXED!!!!!!!! - 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 04-15-2004, 12:34 PM   #11
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ECT = Engine Coolant Temp I should have known that. (feeling stupid)
I was told the ECT was the same on both engines so I did not change it.
Do you think it could be that easy? Or is it more likely in the tranny?
My friend has a snap on scan tool so I hope we can put it on this weekend.
I will look over http://www.williamwren.com/Bonnevill...umba/page1.htm
as soon as I get some free time
Thanks to all
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Old 04-15-2004, 01:59 PM   #12
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Update: Called the friendly neighborhood parts man to find out if the ECT'*
are the same for both engines, and of course they are.
Next is the scan tool, sure hope I find something there.
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Old 04-15-2004, 11:30 PM   #13
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Well, I wasn't really leaning towards a faulted ECT. If the ECT was faulty, it would have probably manifested itself through other symptoms. The other thing that comes to mind would possibly be the transmission fluid temperature sensor input to the PCM. If the transmission is overheating ( high fluid temp.), it'* my understanding that the TCC will not apply. But the scantool will tell the story. Good Luck
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Old 04-15-2004, 11:55 PM   #14
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I have the 'No OD when warm' problem in my 1994 SLE too. But I can work around it though. I go about 5-10 mph over the desired speed, shift into neutral, shut the engine off, open drivers door (just enough to shut electricals down), restart, shift into OD, and use the cruise control to adjust speeds. Once I hit the gas or the brake it drops out of OD, and I have to repeat the process.

Anyhow, you can be sure I'll be watching this thread (wish I had more useful input) as it may help me to solve my problem also.
Good luck,
Martin
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Old 04-16-2004, 12:14 AM   #15
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Have either of you guys checked for trouble codes?
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Old 04-16-2004, 03:13 AM   #16
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Hey BlueEyesBonne, when I first bought my 94 SE, I had the exact same problem. When I first got into OD, it would lock the TCC for 10 seconds, until the computer recognized that the tranny was slipping something terrible. Then it would drop back into 3rd gear until I power cycled it (basically, just leaving the car in drive and flipping the key off and back on fast enough so that it would power cycle the computer but keep everything spinning). The only way I could keep it in OD was using cruise control.

Fortuently, the dealership I bought my car from had a 7 day warranty....since they had to buy me a new transmission to fix the problem...
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Old 04-16-2004, 06:26 PM   #17
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Hmm. Mine has not been slipping at all and the fluid is clean as can be. I had the codes read and got the codes for the Quad Driver Module A & Quad Driver Module B (both of which are part of the computer so I need a new ECM), and a code for the TC Lockup solenoid. I had a total of like 4 codes, the other being the ignition module.
Hope to have the new ignition module and ECM in the car in the next 2-3 weeks (have to if I get the SSEi sold by then -not getting many hours (-$) at work so have to sell the SSEi as I think I should head back to College).
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Old 04-16-2004, 06:28 PM   #18
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Each of the Quad driver'* monitor 3 or 4 other engine sensors/parameters. It'* possible that the PCM is fine, and you have other problems. Consider the QDM'* as 'hub'* for other devices
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Old 04-16-2004, 06:38 PM   #19
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Quote:
Originally Posted by willwren
Each of the Quad driver'* monitor 3 or 4 other engine sensors/parameters. It'* possible that the PCM is fine, and you have other problems. Consider the QDM'* as 'hub'* for other devices
Sorry to go off topic, but if you could PM me (even reply here so others would know) which sensors would they be that each monitors? Thanks in advance.
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Old 04-16-2004, 07:18 PM   #20
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Quote:
Originally Posted by OLBlueEyesBonne
Hmm. Mine has not been slipping at all and the fluid is clean as can be. I had the codes read and got the codes for the Quad Driver Module A & Quad Driver Module B (both of which are part of the computer so I need a new ECM), and a code for the TC Lockup solenoid. I had a total of like 4 codes, the other being the ignition module.
Hope to have the new ignition module and ECM in the car in the next 2-3 weeks (have to if I get the SSEi sold by then -not getting many hours (-$) at work so have to sell the SSEi as I think I should head back to College).
Those codes do not mean that your computer is bad. They mean that your computer is seeing an incorrect voltage on one of the driver lines.

Please give us the exact code numbers.
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