This is becoming a very common replacement. After miles, the birfield joint in the front end of an 80 series are loose. Full-time 4wd contributes as well. These are new replacement joints that will get your axle back in good order. This is a tricky model, some have ABS, and some do not. These birfields come without the ABS ring, you are expected to pull your old one off and press it on this new birfield. You must be careful, this ring is not available. Sold each.