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There are several possible causes. A few:

  • The engine is cold and making less power so you are pushing the gas peddle further causing the transmission to hold the gear longer
  • The computer is programed to do this ( but I have no idea why it would be)
  • The transmission has a sticky or stuck valve that requires the higher speed to move.
  • It is really really cold and the oil in the transmission just needs time to loosen up.
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Q: Why high rpm when changing gears in an automatic when engine is cold?
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