When the weather is cold out, I have to let my car warm up for 3-5 min before I feel it is ok to drive it. If I don't let it warm up, then it won't change gears. It's an automatic so I don't know what gear it's not changing to, but when I get up to around 35-40 mph I can tell that it hasn't changed! It doesn't do this during the Summer time, only in the Winter. What can I do besides letting it warm up for several minutes?
 
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