For offset pinion support (p/n# 57995) 35 spline, 10.5 lbs. MW 35-spline upgrades the 12 Bolt to 35 spline eliminating axle breakage. Requires MW C-Clip Eliminator kit or weld on housing ends and MW axles. Manufactured from through hardened 4140 high strength steel, black oxide coated. - LIMITED STOCK- Installation - Service instructions can be found on Service Bulletin #0053.