These rear ends are designed in a way that they don't usually grip on both sides at first. It kind of works up to transfering traction to the other tire. You get an initial spin from lose of traction and then the power starts to transfer over to the tire not spinning. Unlike the older style that was on or off with no in between. You can softly apply the e-brake to get them to grab a little sooner.So the other day i was stuck in the snow with my awesome stock tires and noticed only only tire was spinning in my LS diff, but as soon as i put the truck in drive the axle chatters and both spin till i give it a little more throttle.... is this normal? The truck will still light both of them up on the pavement tho?