The Dana Spicer 510399-1 (also listed as 5103991) is a basic overhaul bearing and seal kit designed for the DDH40 axle differential with driver-controlled differential lock, covering units built before June 16, 2008. This kit consolidates the bearings and seals needed for a differential overhaul into a single part number, reducing sourcing time for fleet maintenance and shop use. It is sold by Pro Gear and Transmission as a genuine Spicer part. Call us to confirm proper fit for your specific axle build date and configuration before ordering.
Features
Dana Spicer part number 510399-1 or 5103991
Application: DDH40 axle differential with locking differential (Diff Lock)
Covers DDH40 units manufactured before June 16, 2008
Includes differential bearings and seals for a basic overhaul
Sold as a single kit (each) for streamlined parts ordering
Genuine Dana Spicer component sold by Pro Gear and Transmission
Tech Specs
- Part Number: 510399-1 or 5103991
- Application: DDH40 Differential with Locking Diff (built before 6-16-08)
- Kit Type: Basic Overhaul - Bearings and Seals
- Sold as: Each
