Strange S-Trac Differential Fits 9" Ford With 35 Spline Axles Requires Aftermarket 3.250" Bore Case

Part Number: N1980 Application – Ford 9″ with 35 spline axles RequirementsAftermarket 3.250″ bore caseAxles with 30 degree pressure angle DescriptionStrange 35 Spline S-TracThis helical gear differential offers smooth and progressive power transferSuperior design and quality make it ideal for the most abusive Street/Track applications FeaturesTorque Biased, Mechanical & Clutchless• Maximizes traction and acceleration• Dependable and maintenance free• Quiet operation Forged Steel Case Halves• Heat treated• Fully machined• Provides a light, durable, and rigid unit Internal Gear Pocket Geometry• Minimizes stress risers• Increases service life Dry Film Solid Lubricant Coating• Applied to thrust surfaces• Minimizes component wear 9310 Steel Pinion Gears• Chrome moly material• Provides the ultimate in torque carrying capacity Aggressive Gear Helix Angle• Promotes superior torque bias• Excels in situations of unequal traction All Internal Gears Made from 9310 Steel• Vacuum heat treated f