my 2000 mustang v6 has an issue when the car is cold my automatic gear shift works fine but when the car heats up the shift starts to get stiff. The warmer the car gets the stiffer the gear shift gets. Its an automatic so it does not affect me too much until I have to put the car in park after I get to where Im going. Once the car cools off the gear shift goes back to working properly. Any ideas???????