My transmission is in great disrepair all of a sudden - 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 07-05-2010, 11:56 PM   #1
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Default My transmission is in great disrepair all of a sudden

Basic Stuff
Yesterday the SLO was driving just fine, but today I got in it and it felt like I had left the parking brake/emergency brake on. So I played with the pedal, and clearly I could tell it wasn't engaged. But it really felt like it was towing another Bonneville. With 3K-RPM acceleration from 0-20 in about 10 seconds, something'* wrong. It still drives and such, but I parked it and am using another car now.

Observations
I think it'* not shifting into 1st and is just starting from second. And it also is really slipping through 2, 3, and 4. I don't think I have TCC lockup anymore, but there'* no SES light. I'm going to start it again maybe tomorrow and see if an SES light comes on. Also, I parked it in a clean spot across the street because there'* a puddle where the SLO was parked. This puddle has the appearance of water but the consistency of oil. I'm not sure what it could be - possibly brake fluid? It'* in the wrong spot though, and the brakes don't feel like it.

Actions Taken Thus Far
I've called PRJ Performance and left a message, and I'm going to look at a couple more places. I'd like a trans rebuild, but I'm afraid it'* going to be set back by the airplane ticket cost of me going to Serbia for a bit. Then again, if it'* not set back, this is perfect timing so that I can limp the SLO a bit, go to Serbia for the duration of the trans rebuild, and come back to a fresh transmission!

Options for Input
Should I try a trans fluid flush? I changed my filter 30K miles ago at NEBF. What are some uncommon but awesome things to do during a trans rebuild? And overall, what do you think of this?
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Old 07-06-2010, 12:02 AM   #2
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Here'* what you should try first. Pull the main plug and find pin E You will see two rows in the center, pin E is on the outer holes, just look inside for the brass. Check for voltage there with the key on run. You should have battery voltage there. If not, start looking for the fuse. On my car it was labeled misc engine/cruise control.
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Old 07-06-2010, 01:19 AM   #3
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Very awesome! I'll give that a shot tomorrow. Is that for a shift solenoid that controls 1st and 2nd gear shifting? I had an issue with Shift Solenoid B in my 94 which wouldn't allow 3rd and 4th to have TCC lockup.
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Old 07-06-2010, 07:57 AM   #4
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Pin E provides power to all the solenoids but one.
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Old 07-06-2010, 08:00 AM   #5
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Wait, how do I find this pin labeled by a letter? Is it written on the connector?
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Old 07-06-2010, 08:08 AM   #6
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Old 07-06-2010, 08:27 AM   #7
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Thanks! I'll let you know how it goes.
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Old 07-06-2010, 08:49 AM   #8
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The connector does have labels as well.
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Old 07-06-2010, 08:50 AM   #9
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Even better! Now, time to get to work! Let'* hope my new wheels and tires see some more road time soon.
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