So I ordered a 3k-3.2k stall for my 09 challenger rt. Had it installed. One I was called it was ready I went and pick my car up. On the way home it felt like nothing was wrong. I live about 25 mins away from the shop. Once I was home I let car sit for about 1 hr. Then I got back in the car to go for a ride. That?s when the trans Started slipping in 4th gear. It would go into 4th but wouldn?t accelerate just rev rpms. So I took it back to the shop and they told me the tcm need be recalibrated but I can?t find anyone who can actually do that. Then when I go to the shop and check up on the car the guy told me they reset the tcm to see if it would work. But when we went for a drive it went into limp mode. Anyone have any idea what?s the problem. The shop is not doing much to help me except say the tcm need be recalibrated