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Once engine warms up, it won’t move

H3LLS1CH3LLS1C Member Posts: 2
edited October 2018 in Jeep
I have a 2007 Jeep Grand Cherokee Laredo. When the engine is cool, it’ll run perfectly fine. Once it warms up, it doesn’t want to move. What could be the problem?
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    Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    You mean the transmission won't engage in any gear?
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    H3LLS1CH3LLS1C Member Posts: 2
    edited October 2018
    @Mr_Shiftright
    It won’t engage when it heats up. When it gets up to temperature it won’t move. 
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    Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Could be a lot of things. First of all, it's always a good idea to check the fluid level and get that possibility out of the way.

    Then you could go one of two ways here. It's possible that on an old car like this, that the transmission filter hasn't been serviced in a long time. So a fluid change and filter service might be one "guess" that wouldn't cost too much if you were wrong.

    Other than that, what comes to mind is some kind of internal pressure leak, which would have to be diagnosed with a pressure test, done at an automatic transmission specialist.
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