Quote Originally Posted by C9x
3.25 is the ratio I'm putting together for the 31. Got all the tools made and am just waiting for my inch-pounds torque wrench to arrive via the big brown truck. Funny part is, they're just a touch higher in overall gearing (tire diameter included in the figuring) than are the 3.70's.

I had no idea gear sets were so high in price. Guess I should probably peddle the 4.57 Detroit Locker I'm using to roll the car around with. I think it's a nodular as well, but need to look to make sure....
I ended up with taller tires then originally planned. With a 29.1" tire and 3.25 gears, works out to 66.6 mph @ 2500RPM which really isn't too bad. Rule of thumb tho is .12 x tire dia. would make it a 3.50 for an optimum gear.

Try posting the 4.57's in one of the for sale threads - someone will buy the diff, if for nothing else, the 'N' case and the locker - gear set are relatively inexpensive as are the bearings. This, with $3/gallon gas and fewer gas stations, is no longer an acceptable road gear