Mack Gear Set, A-39664-1

Gear Set Ratio: 4.89 Ring Gear: 18.00 inch Outer Diameter x 9.88 inch Inner Diameter x 44 Teeth Pinion Gear: 2.55 inch Spline Outer Diameter x 50 Spline Teeth x 9 Teeth M50 x 2.0 Thread

This Mack part carries a 2 Year Warranty