tranny hunts for gears around corners - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-29-2005, 04:28 PM   #1
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Default tranny hunts for gears around corners

Hi, not sure if anyone has ever gone though this problem before. My 98 SSEi w/161,000 hunts for gears around corners going about yeild speed. It also does the same thing if I come to a yeild sign quick and axcell fast after it, the tranny will act like it is stuck in torc lock up mode or it is just plain stupid , it doesn't know which gear to go in unless I give it a kick in the butt with the gas then it will finally downshift to 1st around corners or after yeild sign. Had it to 2 difrent transmission shops and theres is no codes, level is fine as well as with the fluid. One of the techs thought it was the PCS because the pressure drops very low when the tranny acts up so I had them replace it but this 395.00 repair did not work. Please get back to me on this. Oh yah, this has been going on since about it had 120,000 on it. Toddster.
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Old 08-29-2005, 04:42 PM   #2
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Are you sure it'* gear hunting, or might the motor be hesitating?


wrong section BTW, should be in 1992-1999 rather than 1987-1991. No biggie though, a staffer will move it shortly
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Old 08-29-2005, 04:49 PM   #3
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I know its the tranny, the motor has been on a scanner also and no problems found.
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Old 08-29-2005, 05:08 PM   #4
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Ok..There was a thread recently in 92-99 about fluid level in trannies.

GM gives us a dipstick and tells us that is the correct level. This is what I go by and will continue to use.

However a few mentioned if you turn a specific way the fluid gets hammered to one side causing a low level..aka low pressure situation. I believe it was a 1/2 quart that was suggested.

Please understand I am providing something that was already discussed, not suggesting you to overfill your transmission. My suggestion would be to search out the thread. I believe if you look up "half quart" with author Rogue you will find it.
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Old 08-29-2005, 07:47 PM   #5
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That sounds goods and all but, this problem has hapened at a straight yeild sign. Does that still mean that my fluid is being pushed to one side?
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Old 08-29-2005, 07:49 PM   #6
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I would check the fluid level before any further troubleshooting.
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Old 08-29-2005, 08:03 PM   #7
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From Rogue'* write up: (I always put 1/2 quart EXTRA into the trans when filling. The 4t65E has a fluid starvation defect where its possible on a hard left turn for the trans not to have enough fluid where it needs to be. An extra 1/2 quart helps take care of this.)
This sounds logical but mine hunts for gears around all corners left right and going straight from a quick stop. -Toddster :?:
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Old 08-29-2005, 09:07 PM   #8
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This is a touchy subject...

The 65-E is a highly computer controled tranny....

There are various inputs that have to be correct... There is a force motor of sorts that controls line pressure, but ultimately the PCM controls the pressure and the shift points, TCC apply, and shift quality...

With the milage on your car its not all that impossible that the trans is showing signs of age...

When the tech had the car hooked to the scantool he saw no codes...?

Did he take the car for a real world drive to see what the problem may be, with the scantool in hand( usually a good snap on )?

You may need to take it to another tranny shop... They are not all equal... There are some out there that do know a lot about the GM FWD transmissions...

Good Luck

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Old 08-30-2005, 12:17 AM   #9
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Thanks for making me remember, The first tranny shop had the scanner with them in the car while they where test driving the car, but they found no codes there. I told them to beet on it if they had to just to make shur that the tranny would act up. They had a tech that new about GM cars like ours and thought all my car needed was the Computer to be reflashed with the latest codes from GM to fix my tranny prob. This did not work but did fix the wierd shift from 1st to 2nd at full throttle burn out. Pretty cool. It would burn serious tire all through 1st at a complete stop then dog at 2nd then catch its self and burn a little at 2nd gear. But after the CPU reflash w/the new codes from GM all fixed and it will lay good rubber like new. But back to the daily driving or normal drivig problem, I went to a diffrent tranny shop and trouble shotted with them for a week. I finally tould them to let me drive the car with there tech in the cra with scanner. I made the tranny act up at every corner I took. His Scanner read that my tranny loses serious pressure around corners and and quick stops. I don't remember the numbers but if I'm suposed to have like 14 pounds of pressure at the corners my tranny goes down to like 4 to 6 pounds at corners and quick stops and excells. The second shop did use a snapon scanner to.-Toddster
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Old 08-30-2005, 12:37 AM   #10
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"It would burn serious tire all through 1st at a complete stop then dog at 2nd then catch its self and burn a little at 2nd gear"


Mmmmmhmmmmmm.

You don't say?
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