Transmission is slipping when it has become warm after two or three miles of driving

2006 CHEVROLET OPTRA
56,000 MILES • 1.6L • 4 CYL • 2WD • AUTOMATIC
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AL-AHEDL
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My car is listed above with an aisin automatic transmission. the problem is when I start driving for few miles and car becomes warm in normal temperature its speed slows down like the transmission slip or loss its power. sometimes the ATF is becoming foamy like there is air pressure inside it but when I stop the engine and restart again the car move in drive range and go to slip again.. please help me to solve this.
Thank you
Jun 12, 2020 at 4:28 PM
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ASEMASTER6371
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Good morning,

The first thing I would do is service the transmission fluid. I would change the fluid and filter as the filter may be the issue not allowing enough fluid into the front pump for building the correct pressure for the clutches.

https://www.2carpros.com/articles/automatic-transmission-problems

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy
Jun 13, 2020 at 6:23 AM
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AL-AHEDL
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Thank you for your reply but fluid is new and filter... when restart the vehicle it moves about one tow km and starts to loss power or transmission fluid pressure.
Jun 19, 2020 at 7:16 AM
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AL-AHEDL
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This happens when fluid reach its normal temperature.
Jun 19, 2020 at 7:18 AM
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ASEMASTER6371
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Okay, you have an internal problem. It could be seals or clutches.

The transmission will have to be removed and inspected. Most likely you will need to replace it with a new or used transmission.

https://www.2carpros.com/articles/bearing-press-how-to-use

Roy
Jun 19, 2020 at 7:22 AM
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AL-AHEDL
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It's Aisin 40LE.
Jun 19, 2020 at 9:54 AM
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AL-AHEDL
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Okay, engine I will, thank you.
Jun 19, 2020 at 9:55 AM
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ASEMASTER6371
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Yes, I know that. It was the transmission for the car.

Roy
Jun 19, 2020 at 10:16 AM
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AL-AHEDL
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We found some water in the wiring harness connectors of the transmission.
Jun 22, 2020 at 1:17 PM
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ASEMASTER6371
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Water is not good at all. The question is where did it come from?

Clean the connector of all fluid and re attach and drive it and see if it is still doing the same thing.

Roy
Jun 22, 2020 at 2:06 PM