how to recalibrate speedo after gear swap

[geogolf]

does anyone know what I have to do to recailbrate my mph after i changed from 3.07 to 3.54 gears car is 1990 A4 corvette any help is greatly appr. geo

 

[Black Bart]

What I did when I changed my gearing was go to my local chevy dealer and order the proper gear. It is a fast and easy job to change the speedo gear.