SPEEDBOX™ GPS/VSS to Mechanical Drive Speed Converter
SPEEDBOX™ Mechanical Drive Speedometer Box. For USDM (Ford, GM, or Chrysler) speedometers only. The Speedhut SpeedBox is designed to operate a cable-driven mechanical speedometer using an electric speed signal from GPS or modern transmission. The Box can be installed in the dash or under the hood.
Drive Output Thread is 7/8"-18