New Guages? Speedo Calibration?

[Crash00527]

hey fellow v-6 ers lol.... maybe some can help me out here im suping up my stang here one of the final touches is a 150-mph white face speedo. i hear you gotta recalibrate the speedo after you do that so it can match the v6 120 mph so the reading come out right when ur driving mph, rpm etc. others say i gotta change a gerra in the tranfer tranny case. any got a clue what to do? thanx guys

 

[ameiurus]

I don't think you have to do any of that. I replaced my 120MPH instrument cluster with a 150MPH cluster and (except for the odometer; see another post) everything worked great. Speed reading is accurate. Must use the same signal and adjust within the instrument.