Reluctor Rings 4L60-002 and 4L60-003

WHY YOU NEED ONE. Without the correct Vehicle Speed Sensor (VSS) and Reluctor Ring, the fuel-injected TPI or TBI engine with electronic transmission that you install in your swap will run poorly and will not pass a smog test. Download our free book excerpt on Vehicle Speed Sensors for the big VSS picture. How do Reluctor Rings fit in? Each of the 40 nubs of either size of our 4L60-E reluctor rings emits a magnetic pulse picked up by the nearby speed sensor (creating more pulses per second as the shaft the ring is on rotates faster). The rotational speed indicated by those pulses allows the Engine Control Module (ECM) to control shift points, idle speed, air/fuel ratio, anti-lock brakes, and other stuff. WHICH SIZE RELUCTOR RING DO YOU NEED?  Take a look at Figure 1 below.FIGURE 1 Some output shafts (from cars with R700 non-electronic transmissions and most aftermarket transfer case adaptor and output shafts) include the governor gear shown on shafts A and C above. The governor gear dri