GM Ring & Pinion PackageRatio: 4.56Teeth: 41-9Ring Gear: 7.5"Series: 2Includes Special Cross Pin Kit Includes:Richmond Gear GM Ring & Pinion Gear Set 836-69-0326-1JEGS 75W-90 Synthetic Gear Oil 555-28050JEGS Complete Differential Installation Kit 555-61222JEGS Limited Slip Additive 555-60120Richmond Gear Cross-Shaft Pin 836-80-0270-1