Transmission

Torque converters do not come into play until the vehicle is above 35 miles per hour or so -- so no, I don't think your torque converter has anything to do with anything. Often times for this vehicle, there may be an internal transmission hydraulic or clutch concern that is causing the problem. Electronic transmission testing should be performed to see what the shift commands are versus what the transmission is doing. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops