Transmission not shifting properly

2005 BUICK LA CROSSE
177,000 MILES • 3.8L • V6
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JACKNUT
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  • 65 POSTS
1. Every now and then at street light in gear light changes and I go I get a slight bang in gear. shifts fine no slipping. Screen has been changed when it should be. next. added coolant bled system. gauge reads in 1/4's. Never gets higher than between 1/4 and half doesn't over heat and no code just doesn't get as warm as it should. Thermostat was changed I don't know why and I don't know what temperature thermostat.
Dec 8, 2020 at 10:48 AM
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ASEMASTER6371
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Good afternoon,

I would change the fluid and filter again. The filter may be partially clogged with debris causing the issue.

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

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

Roy
Dec 8, 2020 at 11:57 AM
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JACKNUT
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  • 65 POSTS
Okay. How about the heat problem?
Dec 8, 2020 at 1:13 PM
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ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
We can only deal with one issue per question.

Please start a new question just for the heat and we will be glad to help.

Roy
Dec 8, 2020 at 1:15 PM