Description This module recalibrates speedometer signals or corrects sine/square wave compatibility issues — useful when changing axle ratios, swapping tire sizes, or integrating aftermarket speedometers. It supports both high-speed (up to 250,000 PPM) and low-speed (down to 4,000 PPM) signal ranges. Features Recalibrate a high speed (64,000ppm – 250,000ppm) signal for an OEM speedometer. Do not use this unit to adjust a signal going to an anti-lock braking system Recalibrate a low speed (8000ppm – 4000ppm) signal for an OEM or aftermarket speedometer or fuel injection computer Convert a high-speed signal found on newer GM transmissions down to a low speed signal to run a speedometer, cruise control, or fuel injection computer Convert an 8000ppm signal from an aftermarket signal generator to a 4000ppm or 2000ppm to run an OEM cruise control or fuel injection computer Convert a 16000ppm signal from a VDO Hall Effect signal generator to an 8000ppm, 4000ppm, or 2000ppm to run a cruise control or fuel injection computer Convert a 4000ppm signal from an OEM transmission speed sensor or ECM output to an 8000ppm signal for an aftermarket speedometer Sold Individually Manufacturer Description The PPE Speedometer Interface Module is designed to recalibrate a speedometer signal or correct sinewave (AC)/squarewave (oc) signal incompatibilities.Features/Applications: Applications: