This enhances the fluid to make up for worn out fluid causing stiction issues, by adding this to your box, you may have a very slight duration (less than a week of no shudder drive, but the 2-3 delay/shuttle shift cannot be fixed unless the valve body is worked on and the torque converter replaced.
Your cars torque converter is literally damaged from the dumbass programming that toyota did, its a tiny clutch which toyota programmed to fully lock at abt 35 kmh which basically lugs it so bad that its static friction is overcome almost instantly, it overheats and warps out of shape which then causes dragging and shuddering as the flex lock adaptation comes into play.
I have repaired dozens of these model camry, its a fantastic screwup by toyota and as usual they dont give a hoot because they know their buyers wont ever complain to them, even when the car is under factory warranty.