Incorrect Gear Ratio?? P0730 2001 9-5 aero
 

I have a unique problem. After about 30 miles of driving, my 2001 Saab 9-5 Aero (74000 miles) has a check engine light come on and an exlamation point alert next to it. After driving it a little more it goes into "Limp home mode." I took it to a transmission place and they held it for 2 days then said they would need to take the engine out to see if they could find anything. But they charge $900 just to look. I'm a recent college grad so I dont have $900 to blow just to see if they can find something, then pay more labor and parts on top of that if they actually find something. I know its not an easy process but it's more than I can afford. I can definitely feel a problem when the cars shifts gears (automatic). The code that comes up is P0730- Incorrect Gear Ratio. Please let me know if you might know whats wrong.

Is your transmission slipping any?