Difference between 150mph and 120mph speedometers.

[buie1289]

OK, I'm putting in a 150mph speedometer and I have stumbled across a question.  Assumably there is a difference in the calibration between the 2 speedometers. Is the speedometer itself calibrated differently, or is there a different drive gear in the transmission, or something else? What do I need to make it read correctly?

Thanks!

[Nacho-RT74]

is a plug and play job... nothing to worry about tranny. Speedo is already calibrated and with propper gears inside to translate same tranny/speedo wire/gear setup you already have.

As far you have the correct tranny speedo gear matched with wheels and differential gear ratio, everything will be correct as it was.

Otherwise, you'll get red high beams indicator instead blue one ( if your 120 speedo was blue )

[buie1289]

Ok, thanks Nacho!!

[Ghoste]

Of course the other difference is that now you'll be able to go much faster. 

[buie1289]

See, that's why I wanted one!!