I'd still like to know what is in there now.. I guess you have no idea, have you?
You can do the "count the turns" trick. Go jack up one back wheel... Put her in neutral with the brake off... Now With chalk or something you can see make a mark on the tire near the ground and another on the driveshaft..
Ok now turn the tire ONE TIME around while counting the turns on the driveshaft. And there you will have the existing gear ratio. The driveshadt will turn either 3 times or 3-1/4 times or 3-1/2 times or 3-3/4 times or 4 times.
You should FIND OUT what is in there before making a firm decesion on what to purchase.
My opinion a 4:11 in a 2 wheel drive with 31 inch tires is too low! I wouldn't go over 3:73 if it were me. And I may just opt for a 3:50 depending on what is in there now and how much it lugs.
REMEMBER rpm equals gas burning!
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />