Bla, true enough. As far as an answer,I,ll give it a shot but I have to give this disclaimer,I'm no mechanic and I'm not sure if these applications of mechanical actions really are applied in the game. LSD -limited slip. During normal accelleration the car is being pushed or pulled, RWD or FWD by only 1 of the wheels(the drive wheel) 1/2 of the axel. Now,under full accelleration if the drive wheel loses traction a mechanism in the axel locks the other half of the axel so power is going to both wheels. Now this has nuthin to do with which gear your in it's just that this event happens in the lower gears because the engines power is more capable of over-powering the drive wheels traction. Now the reason that cars only have one driving wheel is so they can turn, go around corners. If both wheels were driving as it tried to go around a corner the out-side wheel would have to turn more times around in order to keep up with the inside wheel and since it can,t it would be put in a bind. Imagine you holding a rope 5ft long, a friend holds the other end , you turn in a circle, the friend has to turn in a circle with you and must keep their same relative position to you, say their left side to your right side. It takes very little effort for you to turn but your friend will be in a hurry trying to keep up,taking many more steps than you. If the friend were only aloud to take the same amount of steps as you they would fall behind. Now, Limited Slip Decelleration, that,s a whole different story. When you are driving and you let off the gas you coast,ok, but you coast at a different rate per which gear you are in. When you are in 1st gear going 40 mph and let off the gas the car slows faster than it would if it were in 2nd. Now what if you were going 80 miles an hour in 5th gear and you wanted to be in 4th real fast but you accidentally slammed it into 2nd. The engine isn't able to turn fast enough to drive the wheel 80 mph in 2nd gear so the axel disengages the drive wheel untill the car has slowed down enough,otherwise the drive wheel would act like a wheel with full brake on and the engines revs would be maxed untill the cars speed slows enough that the engine is capable of turning the drive wheel at the speed the car is traveling. This is how I understand it, hope it helps you out.