Dek, You'll be able to get pretty close to what the ratio is just by eye-balling the shaft revolutions: 3 1/4=3.23, 3 1/2=3.50, 3 3/4=3.73 etc.
Cycleguy, As I remember, I didn't have to remove the pinion so the lash to the ring gear was not affected. Anyway, it was a darn good unit and the pricing is very reasonable. $350 (=-) at Summit. Hard to beat if you're willing to but up with the clicks. The first time was a bit unnerving.
