How much would it cost to overhaul an automatic transmission?

Thank you for such a timely reply. My trooper has been parked in front of the garage for 10 months. I tried to start it up last week and nothing. The battery may need jumped or a new battery. I'm not mechanically inclined. To get in touch with my ex is out of the question. So, this journey begins and ends with me. The AAMCO (highly recommended) is 10 miles down the road. I freely admit that I'm clueless and have never dealt with things like is before. AAA (?) What path do I take 1st? Suggestions are greatly appreciated.

You mention 'AAA' , is a battery something they may cover (if you have them)? Only way to know is to call them , and/or check in whatever papers/contract you have. Maybe a friend could install a good brand (NAPA or AUTOZONE GOLD) ? Then , if you could give us some info on what symptoms it had and why the trans is suspected as bad? No movement? Slipping while shifting gears? No reverse?