4R70W TRANSMISSION I have a 96 mercury grand marque ,on a grandpa take off the trans feels like at around thirty three mph or so it skips third and goes into over drive,then the car doesn't want to pick up speed real well,u give it just a touch more throttle and the car goes to clunking like it is trying to shift back but is not sure of itself ,give a a reasonable amount of throttle it shifts back and goes on ,any help is greaqtly appreciated,i have changed the oil and filter and it did not help,the car has 80,000 miles on it and has been taken care of,ohh andit only does it after it is fully hot,cold it works fine