How close is your speedometer?

[knomadd]

http://chevelleengineer.home.comcast...eer/speedo.htm

This is a website that helped me determine what speedo gear to change to. I hope this helps.

[71GeneralMotorsCorp]

mine is about 2 mph fast.. for example, I was doing 36-37 according to my speedo and my town has a speed trap thingy that tells you how fast your going and I was going 35..

[C5Phil]

Originally Posted by Tbruz

Once you fgure out how fast or slow your Speedo actually is via phone app, pace car or GPS, you can add a speedometer ratio adapter for about $40 between the end of your speedo cable and where the speedo cable screws into your tranny housing.
Tell them your actual speed and what the speedo reads(or distance for that matter) and they can build proper ratio adapter.
Did it with my Blazer, speedo and GPS reading are now within 1%
Thanks
Tbruz

I did the same ....easy fix