Specifications: Ring Gear Diameter: 8 7/8"Pinion Shaft Diameter: 1.625"Ring Gear Bolts: 8Right Hand Threads: 7/16"Pinion Splines: 28Cover Bolts: 12Tech Note:When replacing a 2.73 with a 3.08 or numerically higher gear set, the case must be changed to a 3.08 and higher case.