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2008 grand prix 3800 trans problem

  

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Got a 2008 grand prix 3800 and trans will work for a minute in forwad an reverse then stop work. Will only rev. So if u shut car off for a couple mins and restart. It will start shifting again then stop again after a couple minutes. Trans if full. Any ideas or should i just replace transmission? Any help would be great. Thanks


1 Answer
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Take it to a pro who can monitor and analyze transmission data with a fancy scan tool.


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