During heavy braking does the trans go to neutral? - 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 12-01-2006, 12:03 AM   #11
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I believe it to be fluid starvation caused by the heavy braking for a long duration.
A short stab shouldn't be enough to do it.

The trani will not go into neutral by itself without moving the shifter lever.

Make sure the level is topped up.

I have never experienced this however and I've done some crazy braking tests also.
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Old 12-01-2006, 12:44 AM   #12
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but Hans said "when he brings it up to 2000rpm" i dont think you can rev the motor with no gas
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Old 12-01-2006, 12:52 AM   #13
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I agree with the fluid starvation theory, if I make a spirited left turn with mine, it revs high for a second and catches with a thunk, used to do it on normal left turns until I checked the fluid, noticed it a little low and topped off, then started noticing it was gone unless it was a spirited turn.

worth looking at
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Old 12-01-2006, 01:04 AM   #14
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hmm, kind of a play off this...when im doing a hard turn, even if i have my foot on the pedal pretty well, it just feels like the car will NOT downshift. It will just stay where it is until I come out of the turn....so I am thinking that maybe its the same thing, just fluid starvation when you are stopping hard, I bet its nothing. Just simple centrifugal force for me and inertia for you.

I hope.
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Old 12-01-2006, 08:48 AM   #15
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Quote:
Originally Posted by wjcollier07
hmm, kind of a play off this...when im doing a hard turn, even if i have my foot on the pedal pretty well, it just feels like the car will NOT downshift. It will just stay where it is until I come out of the turn....so I am thinking that maybe its the same thing, just fluid starvation when you are stopping hard, I bet its nothing. Just simple centrifugal force for me and inertia for you.

I hope.
WJC, please discuss your problem in 87-99. You don't have a 4T60E, and your transmission isn't shifted in the same manner. No comparison.
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Old 12-01-2006, 09:56 AM   #16
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Let'* pull this one back a little bit.

The question is under hard braking if the trans goes into neutral.

This is not the same transmission as a couple of you that have replied with your 87-91'*. It'* not a fluid starvation due to accelerating in a turn, this is straight forward braking.

During braking the torque converter does unlock as mentioned. The trans also does feel like a "freewheel" to a certain degree. There is no actual freewheeling or neutral though. Aim down a good hill and you will feel the engine hold you back a little.
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Old 12-01-2006, 01:51 PM   #17
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And iirc, there is a check valve or Ball, that will close when you go to take off again... if not you can enter a neautral of sorts..

I'm not totally sure whats going on here...

When was the last time the fluid was changed?

we can guess all day long... Might want to call a few trans shops and describe the symptoms as best as you can... There may be a few that might give you a decent answer.. If you know of a trans shop that has good word of mouth call them first...

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Old 12-01-2006, 09:47 PM   #18
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I don't know if this is really a problem or not but I used to have a 95 Olds Cutlass Supreme 3.1 do the same thing but only under extremely hard braking then stepping on the gas immediately, what seems like you are doing.
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