The Mack CRD92 front drive differential carries a 4.17 gear ratio and is sold by Pro Gear and Transmission on an exchange basis with core charges applied at time of sale. Before ordering, have the following information ready: fine or coarse spline count on input and output shafts; upper torque rod style (single tapered ball stud hole or two-bolt dog-bone); whether your differential housing has four 3/4" bolt holes at the rear for a transverse rod mounting plate around the through-shaft; and your axle spline count. These details determine exact compatibility. Part number RBT-CRD92-4.17 or CRD92R417. Call us to confirm the right configuration for your truck before placing your order.

• Ratio: 4.17

Sold on an exchange basis. Core charges will apply and may be refunded in whole or in part upon delivery and inspection of the returned core. Core acceptance is subject to manufacturer core policy unless otherwise agreed to in writing by Pro Gear and Transmission. Contact us for a freight quote prior to ordering.