transmission doesnt shift once vehicle get up temperature

Hello, that sounds quite challenging! And, i'm not sure there are any external repairs or services that can be performed to resolve this issue. However, hands on diagnostic testing will certainly help get to the root of the issue. If there are any trouble codes present, they may be helpful in pointing to where the problem is coming from -- if it is internal mechancial or even some kind of electrical sensor issue. I'd sense that it's more internal mechanical based on your concern description. https://repairpal.com/auto-repair-near-me Check that link to find shops near you that can help.