You guys need a new torque converter. My dealer had never replaced one so my car was in the shop for over 30 days as they waited for "guidance" and parts. I also needed a new fuel pump so they had to completely disassemble the rear of the car including the torque tube, rear axle and transmission. It was all put back together and now it runs much better. Try to find a dealer that has replaced a torque converter. There is a TSB out on this issue. Good luck.