This probably doesnt work... but my autoshop teach counted the gears in my 12b to see what ratio it was because I had to regear the front to be the same and it turned out to be 4.56. Well I popped the cover today to get out a bolt I had broken in it and just for the hell of it counted everything. 41 to 10...thats not right i thought...thats 4.10. So I counted again...and again...and again...still got 4.10. But now my front is 4.56 . So could I just swap in a pinion with 9 teeth?