Revisting My Trans Issue's (Trans shop 2/19/07) - Page 3 - 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 01-04-2007, 07:48 AM   #21
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Quote:
Originally Posted by willwren
That'* a bit high on the slip. That may be why it engages, then unlocks. You want to be under 10rpms of slip in an ideal world, but I don't have my FSM'* handy right now to check what the PCM is actually calling for the limit to be.

What'* the condition of your fluid?
Yes under 10 Rpms is ideal... But 15-20 will not harm it or keep it from staying in lock... I get 60 Rpms of slip( Part of the reason I know the trans is on borrowed time ), and part of the reason I added the cooler...

0-10 Rpms of slip is perferred tho

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Old 01-04-2007, 04:53 PM   #22
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Don, I got real numbers out of mine. Actual trans temps that change with driving style..
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Old 01-04-2007, 05:18 PM   #23
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That'* not possible on an OEM 93 or older 4T60. There is no thermocouple in the trans valvebody. It'* just a thermal switch to trigger 'limp' mode.

At some point in time, someone must have replaced yours with something else, which means you can read the temp, but the PCM would not know when to trigger limp. The logic in the PCM wouldn't support the data stream from the sensor.
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Old 01-04-2007, 10:37 PM   #24
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And now I will sheepishly remember that I have a '94 trans...
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Old 01-05-2007, 12:46 AM   #25
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After adding almost 2 bottles of ATF, it still doesnt engage. That trans was thirsty. It shifts a lot smoother in normal driving and when changing r/n/f. I guess it'* up to the rents' if they want to fix it or not. They may just want to wait until it goes. I dont, because i have to drive it for over another year, the camaro isnt near running, and we dont have another vehicle.
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Old 01-05-2007, 08:10 AM   #26
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Check your trans to radiator lines for seepage. Makes me wonder where the fluid went.
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Old 01-05-2007, 01:17 PM   #27
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Quote:
Originally Posted by BillBoost37
Check your trans to radiator lines for seepage. Makes me wonder where the fluid went.
I am almost positive that is where the old fluid went. There are stains and dirt piles on the tubes. If the parents dont want to get it rebuilt soon, I am going to go check the clamps and tighten them.
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Old 02-19-2007, 11:49 AM   #28
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I visited the best trans shop around here and....they said its OK for now. It has the tcc lock, and they showed me exactly how to test it ect ect. They also said I have a bad trans mount, and signs of 2nd gear trouble. I had my dad ride with me today, and we confirmed this:

At 50 MPH the tach reads 1800, and the slip is in the -10 to 7 range.
At 60 MPH the tach reads 2100, and the slip is in the 10 to 20 range.

The faster you go with the more load, the higher the slip. The trans guy said that when the slip gets too high, the computer will throw a code, and thats when it is about to go. So for now, I should just keep driving it. I guess the tcc slip isnt that bad, it only looks like it with the tach being off. Can anyone confirm when the computer throws a code for TCC slip?
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Old 02-19-2007, 02:30 PM   #29
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By the time the trans throws a code it will be too late... But yes, if the amount of slip exceeds a certain value then yes you will get an SES light and a slip code...

Now keep in mind I have been driving mine with 60-80 Rpms of slip for 4 years... I believe installing my massive cooler has helped me out.. But I am planning that it will fail.. Maybe not today, maybe not tomorrow or in several months... But sooner or later with the miles its bound to wear out the clutches...

Keep the fluid changed, and keep it cool and it may give you more life than you think..

as well you really want to see 0 Rpms of slip... But 0-10 is more than acceptable... Your trans is in far better shape than mine

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Old 02-19-2007, 03:47 PM   #30
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Quote:
Originally Posted by jr's3800
Keep the fluid changed, and keep it cool and it may give you more life than you think..
i think your right. They guy at the trans shop said something about these tranny'* not cooling all the way when the TCC slips/doesnt lock up.
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