Well to start off this is my girlfriends car it is a 91 mustang 5.0 automatic...It was originally a 4cyl. and someone swapped in a 5.0 and an auto trans.She doesnt know what the hell they came out of ad we really have no info on the car,as far as i can tell it is a AOD trans and the motor is carburated.Heres the problem someone micky moused the detent cable and it is held on by wire ties an appears to be the wrong one the car runs mint but will not shift out of first i checked the fluid and it is level and red(no smell) and i'm not sure if or when the filter was changed.I dont know too much about mustangs and am wondering if this is a common problem I've seen alot on the net about them not shifting out of 1st.ANy info you can give to point me in the right direction is appreciated.THANKS !!!!