Mine does the same thing. I'm guessing it's the nature of the beast. The locker does add some additional "backlash" as per stated in the user manual. Soo, that would cause the locker to transfer power from one axle to the other instantaneously when on and off the gas, causing a little "shimmy". I would think that if one of the "paddles" was broken that when you were to do the spin test or powerbrake it on pavement only one wheel would spin. Straight from the user manual," Should you make sudden throttle changes or shift gears, you may feel a slight transfer of torque from one wheel to the other until the torque equalizes." Also just to clarify are you saying that it pulls substantially to one side then all the sudden goes straight? If that's the case, something may have been iffy on the locker.
