2003 Kenworth T600 with odometer stopped

The only hard part is getting the cover off the speedo without ruining it, they are crimped on. You can work it off slowly with a screw driver, but it's very hard to get it off and back together without damage. Once the cover is off, it's not hard unless you have fat fingers, it has tiny little screws and gears. I think he charged us about $50 to do it and he some special tool to peel them apart and back together without damage.