Speedo Question

[Lewis1129]

I have a 91 c1500 with a 5spd. I'm about to swap out the 3.08 gear for a 3.73. What do I have to do to fix the speedometer after this swap. Is it just a plastic gear that has to be changed or is it electronic?

 

[someotherguy]

Electronic, and you recalibrate the speedometer itself -

http://www.chevytalk.org/fusionbb/showtopic.php?tid/258562

Richard