DS402 | DS381 Front (Forward) Differential | Eaton Dana-Spicer | Class 8 Trucks | DPX Reman

DS402 | DS381 | Eaton Dana-Spicer Forward Differential — Remanufactured by DPX (40K GAWR) Heavy-duty forward tandem differential, single reduction with power divider, commonly used in Class 8 trucks. Also known as DS381. Remanufactured in Mansfield, Ohio by Discount Parts Exchange - DPX. Each unit is completely disassembled, cleaned, inspected, and rebuilt to your exact ratio using high-quality OEM and aftermarket components. Call DPX to confirm: 419-522-3320. Highlights Model: DS402 / DS381 (Forward Differential with Power Divider) Axle Family: Eaton Dana-Spicer DS341, 402, 402-P, 451-P GAWR: 40,000 lb Approx. Weight: 450 lb Design: Single-reduction with integrated power divider Input Shaft: 115122 – 2.250" 44 spline Axle Gears: 110527 – 2.100" 41 spline Input Nut: 95207 (old generation) or 128049 (later generation) – 55mm socket, torque 840-1020 lb-ft Input Seal: 127719 Output Seal: 127720 Output Nut: 95205 (old) or 127589 (new) – 55mm socket, torque 575-703 lb-ft Carrier Castings: 128107, 110814 Power Divider Casting: 45481 Applications: Over the road, line-haul, and heavy-duty Class 8 trucks Available Gear Ratios & Gearset Part Numbers (Post 4-6-89) DS402 / DS381 Forward Ratios Ratio 2nd Gen Gear Set 3rd Gen Gear Set 3.08* 212901 212901 3.25* 212145 217979 3.36* 127265 217980 3.55* 127266 217981 3.70* 127267 217982 3.90 127268 217983 4.11 127269 217984 4.33 127270 217985 4.56 127271 217986 4.88 127272 217987 5.29 127273 217988 5.57 127274 217989 6.14 127275 217990 6.50 127276 217991 7.17 127277 217992 *16" gearing • Recommended lubricant: Spicer FE 75W-90 synthetic gear oil (or equivalent meeting Dana specifications) What’s Included Remanufactured DS402 / DS381 forward differential rebuilt to your requested ratio by DPX 12-month, unlimited-mileage parts-only warranty Tech support from DPX during install and initial run-in Fitment Notes Common in Eaton Dana-Spicer forward axle applications on Class 8 trucks Special Notation: Early International trucks used a reverse air system for the power divider Verify ratio, spline count, and generation (old vs later) before ordering Image Disclaimer Photos are representative; final appearance may vary by ratio and casting revision. Call to Order Call Discount Parts Exchange - DPX for pricing and availability: 419-522-3320 DPX Drivetrain Tools Hub Free tools built by rebuilders for truckers and fleets — Road Speed & Ratio Calculator, PTO shimming procedure, gear ratio comparison charts, and our full IPL library for instant parts identification. Open DPX Drivetrain Tools Hub → DPX — Ohio’s Premier Heavy-Duty Drivetrain Rebuilder | Built to Perform. Trusted to Last.