These are the Yukon 8.5" GM EXTRA HD standard Open case (uses larger bearings). (Part number YC G26010481-XHD) Yukon Gear & Axle manufactures a full line of standard open and positraction limited slip carrier cases for a variety of applications. Each unit is cast and machined to exacting specifications to produce a carrier that provides both high strength and tight tolerances for a long and reliable service life.
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