Hello, I owned the car for 2 years and put about 15k miles on it . Mostly short distance, but also some 600 mile trips. Transmission worked fine until now. Last week on a trip to the grocerystore it hesitated upshifting,but shifted.After parking and shopping, the car did not move whatsoever. I can shift it thru all gears and it is not even pulling slightly.I had the filter and fluid changed and it is still not pulling.What should I check now before replacing the transmission.Any advice is greatly appreciated, Thank You , Leo!