when i start my car i cant put it into gear unless i rock my car then it pops in on 1999 Ford Taurus

the car runs fine. no check lights are on. it just wont let me move it into gear unless i wiggle the steering wheel or gently rock my car.

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1 answer 2 comments
You mean it wont come out of park until you do this?? More info.
Yes I can't take it out of park until I do those things but once I get it out of park it works fine until I put it back into park.
See if brake lights work properly, had some brk. light switch/connector problems on this vehicle as you have to apply brake to remove lever from park. Possible shift cable problem but i say switch.