You have to make sure which speed sensing unit you have and ajdust the setting on the cluster to match it..... mine is 16K PPM.
I tried the auto setting 1st and it was way off so I ended up using the "adjust" setting..... basicly you go to a straight 1mile+ deserted strech of road, press the sw1 button get to the proper sub-menu then, I used a hand held GPS, drive for one mile exactly press the switch again...... poof done. Now my system is the VHX type but it should be close you what you need to do.