My car won't move at all. The engine starts perfectly. The rpm goes up when I push the gas. But the car refuses to move. Can't reverse or drive. I can put any gear in without any problems. Everything seems to work fine just that the car won't move.
I bought is car a couple of month ago. After a month I had to change the starter so it is a new starter in it
Everything worked fine since then just that the car have always been having a problem with driving when the engine is cold. I have to wait like 15 seconds after I start the engine and put R or D in before the car will move at all. I feel a bump in the car then I know the car will move.
But now it will not move at all.
It is a automatic mercury sable 1995.

What can be the problem please help me

Thanks/ Simon