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I have a 2010 Buick Enclave and had the transmission rebuilt a few months back. It still doesn’t seem to be right. Are there any computer upgrades or things like that that need to be done along with the rebuild? Timing?
 

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The manufacturer provides software updates for the transmission control module from time to time to provide smoother shifting and other updates in response to consumer and dealer input. You need a scanner that can communicate with the TCM to read the level of software you have.
 
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