Transmission releases when I come to a stop then has trouble reconnecting.

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Every time I come to a stop it is like my drive disengages and has trouble rengageing when I push the gas pedal. It also effects my over drive, if I push the pedal all the way down and the overdrive kickes in. When the over drive kickes in the car revs up as if the transmission isn't connected at all. Then when I release the gas the normal drive engages and drives normal untell my next stop. Once the car is moving the transmission shifts perfectly. It does this in all gears besides reverse.