im assuming their 3.73 and 3.91 since it says thats the available ratio options. john, would YOU mind emailing em? i've emailed em 3 times and i think they'll fly out to CA soon and personally smack me if i send another. ask em if they would be kind enough to point us to where we could find a 3.46 ratio ring and pinion set...tell em we'll do anything.........anyyyyyything.....LOL~! thanx big guy