if you've watched my video or similar ones, and it's doing what i've described, then it is indeed the torque converter. just tell them you know that's the issue. but they have to 1) find you a torque converter, a part that doesn't exactly hang off trees, and 2) entirely drain and remove your transmission, install the TC, then refill the tranny and put it back in. The labor is 80 percent of the cost.