[ls1ac]

Terms
Spool:: both wheels turn together. When you turn one wheel drags around the corner. Very poor for street but very good at the drags.
Locking differential: Can be run open or locked up. Good for in the mud and on the street.
Limited slip: operates, as an open differential until there is a difference in rear wheel rotation rates, then it will lock up.
Possitraction: Uses clutches to limit the wheel slip at all times. The normal choice for road tracks.
Torque distributing: Uses the torque differential between axels to distribute the load.
Traction control: uses speed sensors to distribute the load by electric cluthes.
Open diff. Original style used in most road cars.
And combinations of the above