Tranny Slipping - 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 12-31-2007, 11:42 AM   #1
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Default Tranny Slipping

Oh no.
I've noticed this for a day or two, but thought I was imagining it.
I just grabbed a coffee and noticed when I took my foot off the gas, and hit it again, the revs and boost gauge jumped, but the car didn't accelerate. It seems that it'* slipping.
It shifts fine thru the gears, but it seems like when the rpm is low is when it happens.

I switched it to Performance Shift to hope that helps. Any ideas? Hopefully something simple?
I checked the trans fluid level and it'* fine. Maybe start with a change and new filter?

What a way to ring in the New Year...

Adam
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Old 12-31-2007, 02:44 PM   #2
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well dont change the oil in the tranny until you have enough money to replace it. Usally after people change it, slipping occurs. The old oil usally gunks it up, so called, so the only real thing you can do it run anti-slip in it for a while.

That really sucks though. My brothers 11 second regal is sitting in a garage since we were running stock tranny for a while..lol
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Old 12-31-2007, 05:01 PM   #3
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yeah, changing the fluid at this point will probably make it worse.. :(
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Old 01-02-2008, 03:57 AM   #4
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Seafoam Trans-tune seems to be quite the stuff. I've so far used it in a 97 Jeep Grand Cherokee that liked to whine way up before shifting into 4th, and it cured that, as well as a 90 buick lesabre that was slipping horribly, and it cured that for the last 20,000 mi of it'* life. It ended up in the junkyard, still in running condition @ 270k mi because it would have been too expensive to make it pass inspection.

The bottle recommends changing the transmission fluid after adding it though... not sure if that'* necessary or not.

I'm not sure if the chemicals in it might just clean off whatever is holding the ghost in it or not.
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Old 01-02-2008, 09:48 AM   #5
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Hmm,
So I might be better off to leave well enough alone?
The past couple of days it didn't seem quite as bad, so I guess I'll have to see what direction it decides to take.

Thanks for the advice, and if anyone else has an idea, please share!

Adam
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Old 01-03-2008, 10:54 AM   #6
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I've noticed at highway speeds, the car seems to be "vibrating" as I'm cruising along.
Could the problem be a trans mount? Can that also cause the slippage??

Adam
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Old 01-10-2008, 09:15 AM   #7
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GREAT HAPPINESS!
Turns out it was merely a leaking transmission line!

Got it replaced, no slipping! Car is running great, touch wood.

Food for thought if your tranny slips.

Adam
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