This is a used set of Richmond 4:88 ring and pinion gear set for a G M 12 bolt with the 8.875  series 3 carrier had in my car the last 30 years with no issues pinion gear has a small chip on  one of the teeth that doesn't effect performance the chip was there when the gear set was new car ran 11:10 with gears spacer plate for ring gear is included see pics 10 + 11 for chip pinion bearing not included