Hey there i just, this might not be about mustangs but its kinda urgent, got a call from my dad, he has a 99 Yukon, and he doenst drive it much or even very hard. And what happened is that he went to go back it up outta the garage and its a automatic, but first gear isnt first, neutral isnt neutral, and lower drives arent where they supposed to be, its like all the gears got messed up, it all works but its like all the gears got jumbled, and theres no reverse??? can someone help me please!!!