speedometer gear

  1. Speedo Gear questions

    Transmission & Driveline
    I just swapped out my open 10bolt with 2.73's for a 12 bolt. Of course now my speedo is waay off. Does anyone know of a site or a calculator to help me figure out which speedo gear I need? Here's some info: 28" tall tire 3.42 gear ratio TH350 trans