I just used a jeweler's screwdriver and carefully disassembled each layer of the instrument cluster until I got to the odometer gears. This is a good kitchen table project since it helps to lay everything out in the order it was removed. The only mistake I made when I did mine was I forgot to reattach the wire from the odometer to the instrument cluster. I had to remove the cluster from the dash and partially disassemble it again. It worked fine after that. Just one more thing to watch for as you reassemble the unit.