what is the deal with the rear end gears?
What do they do as the #gets bigger? (3.73, 4.10, 4.30)

Sorry if this is a dumb question. Thx

 

the higher the number, the more times the driveshaft turns before the wheels turn once......a higher number will make the car a beast off the line (much easier to spin the tires), but the top speed won't be as high. your car has 3.42s from the factory, and most M6 guys go with 4.10s...