I am having a strange problem with my 95 bird. It is slow to shift from 2-3 and 3-4. It does it at any temp. Reverse, 1-2 is fine. I can stand on the brakes in drive and reverse and it doesnt slip. At speeds of 40-45 it has a delay going into 3.....meaning when you think it should shift, it wont till you hit around 48-50. I just bought the car so I don't know when the fluid was changed but it's bright clean with no burnt smell or debris. I don't notice a problem downshifting. The car has 73,000 on the clock with the 4.6l engine. Could this be a sensor problem?