N400-RR | Dana N-400 Rear Rear Differential | Remanufactured – Exchange Required

Dana N-400 Rear Rear Differential — Remanufactured by DPX

The Dana N-400 rear rear (tandem) carrier is remanufactured for Class 8 International/Navistar trucks. Each carrier is disassembled, cleaned, inspected, and rebuilt to your exact ratio using OEM and premium aftermarket components. Units are verified for backlash, gear mesh, and seal integrity. Remanufactured in Mansfield, Ohio by Discount Parts Exchange - DPX.

Call DPX to confirm: 419-522-3320.

Quick Specs

• Model: Dana N-400 (Rear Rear Tandem)
• Application: International / Navistar (Class 8)
• Axle Shaft Splines: 36, 39, or 41 (verify before ordering)
• Ratio Options: 3.06 to 7.81 (see table below)
• Weight: ~300 lb carrier assembly
• Condition: Remanufactured exchange (like-for-like core required)
• Common OE Codes: International 514-GDCR / Code 14GDC
• Applications: Over the road, dump truck, and heavy-haul fleets

Why Choose DPX

• Rebuilt to your exact ratio — backlash, mesh, and seals verified
• Heavy-duty durability — ideal for over the road and heavy-haul applications
• Straightforward install — painted, tagged, and prepped for drop-in
• Real support — tech help from DPX during install & initial run-in

Gear Ratio Options & Part Numbers (Dana N-400 Rear Rear)

Confirm ratio and spline count prior to ordering.

Casting & Assembly IDs

• Seal Retainer Cast: 454718K1
• Cap & Carrier Casting: 401CF102
• Cap Casting: 401CP100
• Finished Carrier Assembly: Dana 401CS101-X

What’s Included

• Complete rebuilt N-400 rear rear carrier rebuilt to your requested ratio by DPX
• Painted & tagged for installation
• Tech support from DPX during install & initial run-in

Core Exchange Policy

• Core required: like-for-like, complete, and rebuildable
• Possible deductions for cracked housings, burnt/missing internals, water or low-lube damage, or mismatched units
• Call for pickup return instructions

Shipping

• LTL freight to commercial address with dock/forklift
• Residential and liftgate service available by request

Image Disclaimer

Photos show an actual Dana N-400 rear rear carrier from our inventory. Final appearance may vary by ratio, yoke, and casting revision.

Call to Order

Call Discount Parts Exchange - DPX for price and ratio 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 →

Illustrated Parts List (IPL) Reference

For complete part-number listings and component diagrams, download the official Spicer® Drive Axles AXIP-4001 Illustrated Parts List covering the Dana N400 / N401 / N402 tandem drive axle family.
📄 Download Spicer N400 / N401 / N402 Illustrated Parts List (PDF)

Includes carrier-assembly diagrams, ring-and-pinion data, and differential component identification for Spicer N400-series axles.

DPX — Ohio’s Premier Heavy-Duty Drivetrain Rebuilder | Built to Perform. Trusted to Last.