The Eaton Spicer DS404R390 or DS404 390 is a front differential carrier with a 3.90 gear ratio. This unit is sold on an exchange basis by Pro Gear and Transmission. Core charges apply and are subject to manufacturer core policy upon return, delivery, and inspection. The DS404 is an Eaton-Spicer front axle differential designed for heavy-duty truck applications. Call us to confirm this differential is correct for your axle model and truck before ordering.

• Part Number: DS404R390 or DS404 390 Gear Ratio: 3.90 Position: Front Type: Differential Carrier Sold: Exchange (core charge applies)

This differential is sold on an exchange basis. A core charge will apply at the time of purchase. Core charges may be refunded in whole or in part upon return, delivery, and inspection of the core unit. All cores are subject to the manufacturer core policy unless otherwise agreed to in writing prior to purchase. Contact Pro Gear and Transmission for details on the core return process and to request a shipping quote before ordering.