Drivetrain Questions and info regarding transmissions, clutches, etc.

A different kind of AT shifting problem

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Old Sep 13, 2006 | 07:25 PM
  #1  
hotsocal's Avatar
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A different kind of AT shifting problem

If anyone knows of a fix for this or how to reset my ECU can you let me know or if you have the same problem i would like to hear about it so i dont think that im going crazy.

When im in slow moving traffic or in a parking lot just crawling and I go to accelerate slightly I can get my rpms to rise about 1,000 to almost 1,500 more rpms before it grabs a gear its like its slipping i can actually play around with the rpms in that range and never feel like the car is accelerating now i had my computer scanned and found nothing had my tranny fluid looked at by infiniti even though it was replaced 15,000 miles previous just to see if it was low or burnt ( being that i could not do it myself with no dipstick, but thats another story lol ) and they said it was fine.

Does anyone have any suggestions..

by the way its an 03 sedan with 75,000 miles
 
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Old Sep 14, 2006 | 05:31 PM
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Com'on I know im not going crazy on this one.. someone has to have a suggestion
 
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Old Sep 18, 2006 | 09:34 AM
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If it's slipping - take it to the dealer - if your out of warranty - you'll have problems.

For ECU reset - search , it's only been discussed and posted several hundred times.

Likely why nobody has responded...
 
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Old Sep 18, 2006 | 03:11 PM
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It's normal.

The torque coverter's lockup is about 2800 rpms. Meaning that very little, if any, power will be transferred from the engine to the tranny. This helps to get your engine into a more useable power band for initial acceleration than if it locked up in a lower rpm. It's also partly why our gas mileage sucks donkey doo.
 
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Old Sep 18, 2006 | 03:38 PM
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The torque converter stall speed is about 1800 rpm so not much happens below that. If you punch the gas from a standing start and watch the tach, the rpms at which the car starts to move is fairly close to the stall speed.

I also have an '03 sedan 5AT. You do have a dip stick. It is at the rear center of the engine and has a cap that is held in place by a small retaining bolt. If you remove the bolt, you can pull out the dipstick.

If you take a notion to add fluid, remember that the tranny uses a special Nissan fluid ONLY. But why not just let the dealer check it?
 
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Old Sep 19, 2006 | 12:42 PM
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First off thanks for the help guys and i did finally get my search to find the ECU reset but as we all know the search engine on this site is not up to par but thanks any way for that suggestion .

dTor - thanks for that info that was the type of answer i was looking for, now i wont be going crazy thinking something is wrong,, Knowledge = Wisdom you just made me a wiser person.

exagorazo - also thanks for that info and i do believe 1800 is where my trany finally grabs. But as for the dipstick i have taken off that retaining bolt and cap and there was nothing there besides an empty dip stick tub and i was told by the dealer our cars dont come with one so we dont make the mistake of putting in the wrong fluid that is why you have to take it in just to get your level check. And when asking if i could buy one they said it would be a specialty tool and cost over a hundred dollars.
 
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Old Sep 19, 2006 | 06:52 PM
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I vadered this from a thread I started a while back. Do a search for Torque Converters and you'll find it. Look at the very bottom of this page.

 
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