Description Additional Info Product Reviews 3/8" x 1-1/4" ring gear bolt, 55P AUBURN conversion bolt.Ring gear boltFits 1955-1964 GM passenger car with Auburn Positraction3/8" x 1 1/4" Cross References:YSPBLT023 Mfr Part Number: YSPBLT-023 Sub-brand: Yukon Gear Product Warranty: 1