I just changed fluid again with Dex 6 and added Lubegard Red and now we will see if the torque converter shudder will be gone. 97 chevy pickup. I talked to Lubegard today and even they say the shudder fix in the tube is a temp. fix. Did say i could always add another bottle of the red, but i don't think i like that idea much. Never really liked the idea of snake oil before but thought i would give this a try.