Re: What is this diff ???
Ratio will be 3.23 as stated. To check if it a LSD turn one axle and look at the other; if it rotates same direction it will be an LSD(open centre will spin axle opposite way). If it is a LSD get someone to hold other axle while you turn it; if there is little resistance the LSD will probably be in need of a rebuild.
The 3.23 will make the car quicker of the mark and seem lighter to the engine i.e. greater response. It will also rev higher and use slightly more fuel.