This side gear fits the driven rear axle differential on Mack trucks and uses a fine spline design with 43 teeth to mesh with the spider gears, transferring torque to the axle shafts while letting wheel speed vary in turns. It measures 7 in. long, 7 in. wide, and 2 in. high. The part is built as a replacement for the Mack differential assembly.Interchanges:Mack 34KH331Mack 25101929FeaturesFine spline design43 tooth countFor driven rear axle differentialDimensions: 2 in. H x 7 in. W x 7 in. LTech SpecsHeight: 2 in.Width: 7 in.Length: 7 in.Tooth count: 43Spline type: Fine splineSell pack: 1 EACHUsed in these Mack modelsCRD 93 / CRD 113 DifferentialCRDPC 92 / CRDPC 112 Differential