I had jus bought my ford escort and when i was driving it home it would get up to 4000rpm and get ready to shift but then kick out of gear in get into neutral while still in drive, so i go home and put more transmission fluid in it and go try it again and it did again but only once, so i take it on a highway and it started shifting right so i go 5 miles and it worked well but when i went to stop to turn it started kicking out of gear again. So i went home and checked the fluid, it was good but still does it. What do i need to do? Please Help.