Transmission slipping

2005 BUICK RENDEZVOUS
177,000 MILES • 3.6L • 6 CYL
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LORI VEGA
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When driving the transmission is slipping through all 4 gears and when it's in third and fourth gear it is like they're gone.
Both shift solenoids have been replaced.
Aug 20, 2019 at 1:45 AM
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ASEMASTER6371
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Good morning.

How long since you changed the fluid and filter? It may be a clogged filter.

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

Beyond that, it is an internal failure. If the fluid change does not resolve it, the transmission will have to be replaced.

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

Roy
Aug 20, 2019 at 3:37 AM
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LORI VEGA
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We did the code reader and it showed the transmission control module sensor and a o2 sensor. Thank you
Aug 20, 2019 at 1:58 PM
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ASEMASTER6371
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What were the code numbers?

Roy
Aug 20, 2019 at 3:11 PM
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LORI VEGA
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Thank you for your response. I know 1 code was for the o2 sensor and the other code was the transmission controls module. I will have to find the paper the codes were right on.
Aug 22, 2019 at 10:58 AM
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ASEMASTER6371
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Let me know when you can and I can help you more.

Roy
Aug 22, 2019 at 12:01 PM
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LORI VEGA
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Thanks Roy.
Unfortunately I cant find the paper with the codes on it.
All I know was 1 code was the o2 sensor
And the other code was the Transmission Control Module sensor.
Aug 22, 2019 at 5:41 PM
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ASEMASTER6371
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There are many codes for the module. See if you can have someone check it for you.

A parts store will do this for free.

Roy
Aug 22, 2019 at 5:49 PM