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Regarding your rear diff, find out exactly what kind of fluid they are replacing. Also find out if they are adding friction modifiers. I am not sure if they are needed in our limited slip differentials. Friction modifiers are usually present only in small quantity, like a few ounces. They basically allow the limited slip diff to slip when going around turns. I am referring to a traditional style LSD. We may have something more hi-tech, but I think the base LSD with the 2SS package is not electronic or super-fancy.
Your mylink problem sounds to me like "ghost touching." The touch screen digitizer is picking up false touches. Often this is caused by grounding issues within the unit. If you google "ghost touching digitizer" you will find this is not as rare a problem as you might have thought. All touchscreen devices experience it if manufactured in adequate numbers. Since you are still under warranty, get a new screen. A few years from now we can start taking these things apart. Not worth the trouble now.
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