what is limited slip differential?

why its good to have , and iam new in the this staf i would like to learn more about the mods for cars, mabe thear is some web so i can read ?

[Fleckster]

A limited-slip differential, as opposed to the more common "open" differential means that instead of the car sending the power to one wheel (usually the one with the least traction!) it is able to apply the power equally betwen both. In the simplest of terms, instead of being one-wheel drive, the car had true two-wheel drive. Have you heard the term "posi"? This is the generic name for a limited-slip differential that has been taken from the Chevy brand name for their set up in the musclecar era. Chrysler called theirs "Sure Grip" and now usually refer to it in the trucks as Anti-Spin differential. If you want a more detailed description on how it works, I'm sure someone here can help. Have you ever spun your tires on snow, mud, or wet pavement? You probably noticed that probably only one of them spun. (This is usually the case. When the differential is tight a new, it will sometime still spin both a little.) Well the same thing happens with higher power in a racing environment. You try and launch and because the open differential only has power on one wheel, it will spin, causing the car to not run to it's potential. With the limited-slip, it will apply power with both drive wheels and therefore have less chance of spinning the tires instead of launching.

[DarkWolf]

Here you go
http://auto.howstuffworks.com/differential.htm

They have a bunch of other good stuff to read through too.

thanks for answer its clear now