i've been having an issue with my malibu classic recently. It just hit 65000 miles and the transmission started acting up. i've lost power on low speed turns, the RPMs have dropped so low coming to a stop that it actually stalled, at higher speeds the tachometer will literally jump 1000 RPMs and drop right back down. at low speeds, around 5 to 10 MPH, my engine revs up to around 4500 to 5000 RPMs. add to that, my check engine light came on and when i went to AAP to get it plugged in, the code came back saying the torque converter circuit was stuck on. could all those problems be caused by just the torque converter going out?