Check the listing for details. GM 8.5" 10-Bolt Posi - 3.73 Ring & Pinion Gear - Bearing Package - 28 Spline NEW. Condition: New. Listed at 520.00 USD. GM 8.5" 10-Bolt Posi / Gear Package * More Pictures Below * Auction Includes: * BRAND NEW GM 8.5" Yukon Dura-Grip (Eaton-Style) Posi Unit (28 Spline) * BRAND NEW GM 8.5" 10-Bolt Ring & Pinion (3.73 Ratio) * BRAND NEW GM 8.5" Master Bearing/Installation Kit * Everything that you need to Upgrade or Re-Build your GM 8.5" - 28 Spline Application * Gear Ratio: 3.73 *Other ratios available in our eBay Listings* * Premium Quality Parts * * All Parts Include 1-Year Factory Warranty * * Master Bearing/Installation Kit Includes: Carrier Bearings/Races, Pinion Bearings/Races, Adjustable (Super) Carrier Shims, Pinion Shims, Pinion Seal, Pinion Nut, Crush Sleeve, Ring Gear Bolts, Gasket, Marking Compound, Loc-Tite, Brush, etc * Axles Also Available * Click Here To Visit Our EBay Store!! Shipping & Handling: FREE UPS Ground Shipping to Anywhere in the Continental U.S. E-Mail for Canada Shipping Quote Payment Information: * Paypal * Credit Card (Over The Phone 641-751-8060)