Car moves in Park while starting
 

95 seville sts, northstar. Sometimes when I first start the car in the morning the car moves a little bit forward while in Park. Kind of jumps a little. Not real hard but the car definitely moves. Seems it only does it after sitting all night. Would that be a sensor on or in the transmission? I'm getting ready to do a transmission fluid/filter change and if the sensor is in there I would like to change it then. Also if it is a sensor what is the correct name of it so i can buy it.

Normal. The torque converter in the transmission is moving fluid. Also you might try using the PARKING brake the night before. Cars should always have the parking brake set prior to getting out of the car. That way 3500 lbs. is not resting on a pencil diameter pin in the transmission.

lol i wish i could set my brake but my rear cable is broken lol. Spring project.
Mine does that sometimes too lol. I just say it is a big powerful v8 under my hood just wanting to take off lol

couldnt help notice that race horses also do that while waiting for the gates to open.




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LOL,,just had me a little worried, glad its normal thanks for replys