Check the listing for details. GM 8.5" 10-Bolt Yukon Spartan Locker - 30 Spline - SL GM8.5-30 - Posi - Axle NEW. Condition: New. Listed at 250.81 USD. GM 8.5" Spartan Locker - 30 Spline * BRAND NEW GM 8.5" 10-Bolt Spartan Locker - 30 Spline Manufacturer Part Number: SL GM8.5-30 * Larger Stronger Alignment Pins * All Models include Heavy-Duty Cross Pin Shaft * Manufactured from 9310 Steel for Longer Life & Higher Strength The Spartan Locker, by USA Standard Gear, provides reliable traction at a low cost. Give your vehicle great traction and save some cash. Choose a Spartan Locker for better traction. The Spartan locker by USA standard gear is a mechanical locker that replaces the spiders in a standard case. The Spartan locker's design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap! The couplers and drivers are made from 9310 steel, for added strength. Each Spartan locker carries a one year warranty against defect. * Patented Design for Easiest Installation ** This unit works in standard open (non posi / non limited-slip) carriers ONLY ** ** This unit will NOT work in a GM 8.6" Rearend ** * Gears & Bearing Kits 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)