Wheel Speed Sensor Encoder Rings
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The wheel speed sensor encoder rings are magnetized, toothed rings used to create a Hall-effect switch when combined with the wheel speed sensor. The front wheel speed sensor encoder rings are integrated into the front wheel bearing and are serviced with the front wheel bearing. On single rear-wheel vehicles, the rear wheel speed sensor encoder rings are pressed onto the rear wheel axle shaft and are serviced separately from the axle shaft. On dual rear-wheel vehicles, the rear wheel speed sensor encoder rings are part of the rear differential, ring-gear, backlash adjusters and are serviced with the adjusters.