Report "I have a 99 Chevrolet Trooper wont take any gears on the automatic transmission. when its cold it will take drive but very slow and when driving it would jump to neutral. I changed the transmission fluid but still I have the same problem. It started doing this overnight. Before all this started it was working fine, even the 4x4 was fine. But I did notice when we took out the old fluid on the transmission it had water mixed in with it. but this is a closed transmission box. what could cause this problem now that water got in it"