1999 Dodge Stratus Please Help

Hello Need help I Have a 1999 Dodge Stratus and got hit in front drivers side while in drive at about 5mph and now car wont go over about 20mph if you step on gas rpm's just go up and car wont go any faster i had it put on a machine and when the car is in drive it says low or when its in nuetral compter machine says its in reverse but if you actually step on gas your in nuetral

It sounds like the transmission is definitely damaged. Do you have the other drivers insurance info? If he hit you his insurance should pay.