Pro Series Nodular Iron Case Assembly Aluminum Support with Lightweight Steel Spool Standard Gear & Female Coupler

Complete Center Section Includes: N1905 / N1906 3.062″ Bore Pro Iron Case for 31 or 33 spline 3.250″ Bore Pro Iron Case for 35 or 40 spline • 8-10% Stronger Material Than Factory Nodular Iron • Critical Areas Heavily Reinforced • Chrome Moly Main Caps • Solid Steel Adjuster Nuts N1922 Billet Aluminum Tapered Bearing Pinion Support Over sized bearings and races D1553 / D1554 / D1555 Lightweight steel spool in 31, 33, or 35 spline Choice of 3.00-6.50 Standard Gear U3627 Female coupler Professionally Assembled Timken® Bearings & Races Grade 8 Ring Gear Bolts Options 40 Spline Steel Spool……………….…