I checked with myers-durum in tulsa, and they said it was a lot of trial and error, may cost me $400 in labor. wasnt very happy with the trial and error remark. myers part guy told me both spacers for both years were the same. so I pulled mine apart, got the mics out and found the left spacer had to be shortened.... if memory serves me, it was .120 (1/8"). it worked perfectly other than that. bearing, rotors, and axle were fine.