shifting on 2002 Mitsubishi Eclipse

I have a 2002 Mitsubishi Eclipse gt spyder automatic with 139,500 miles. When I start driving, the first shift is good, the second shift is a little jerkish. I have changed the transmission mount motor mount, drain and refill tranny fluid. Any idea of it being a torque converter, timing belt,any kind of clutch. It is a automatic

1 answer
If you know that you have the correct transmission fluid, then I think you may need to get a diagnosis at a transmission shop. There are too many variables for me to know what to think without inspecting your car myself.
If you want to find a Mitsu specialist, here's our directory link for you:
https://repairpal.com/directory?address=95307&car_brand_names=Mitsubishi