Dana N-400 Rear Rear Differential — Remanufactured by DPX
The Dana N-400 rear-rear (tandem) differential is a heavy-duty carrier typically found in International / Navistar Class 8 trucks. Every unit is completely torn down, cleaned, inspected, and rebuilt to your exact ratio with new bearings, seals, and critical wear components. Available with standard open differential or Detroit Locker (NoSPIN) for maximum traction. Remanufactured in Mansfield, Ohio by Discount Parts Exchange - DPX.
Pairs with the Dana N-400 Forward Rear differential to form a complete tandem set.
Call DPX to confirm: 419-522-3320.
Highlights
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Model: Dana N-400 (Rear-Rear Tandem) — also known as N210 (41-spline), N190 (39-spline), and N175 (36-spline) in single-axle applications
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Typically Found In: International / Navistar Class 8 trucks
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Axle Shaft Splines: 36, 39, or 41 (verify before ordering)
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Ratio Range: 3.06 to 7.81
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Detroit Locker (NoSPIN) Options:
- 306S-99 — 39 spline
- 306S-100 — 41 spline
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Weight: ≈300 lb carrier assembly
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Condition: Remanufactured exchange (like-for-like core required)
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Common OE Codes: International 514-GDCR / Code 14GDC
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Applications: Over-the-road, dump truck, heavy-haul, and severe service fleets
Gear Ratio Options & Part Numbers (Dana N-400 Rear Rear)
Confirm ratio and spline count prior to ordering.
Dana N-400 Rear Rear Gearsets
| Ratio |
International Gear Set P/N |
Dana Gear Set P/N |
| 3.06 |
1665354C91 |
401KG113-X |
| 3.21 |
1665355C91 |
401KG114-X |
| 3.42 |
1665356C91 |
401KG115-X |
| 3.54 |
1665357C91 |
401KG116-X |
| 3.73 |
1665358C91 |
401KG117-X |
| 3.91 |
1665359C91 |
401KG118-X |
| 4.10 |
1665360C91 |
401KG119-X |
| 4.44 |
1665361C91 |
401KG120-X |
| 4.78 |
1665363C91 |
401KG122-X |
| 5.11 |
1665365C91 |
401KG129-X |
| 5.38 |
1665367C91 |
401KG125-X |
| 5.63 |
1665368C91 |
401KG136-X |
| 6.14 |
1665369C91 |
401KG126-X |
| 6.50 |
— |
401KG132-X |
| 7.17 |
1665371C91 |
401KG126-X |
| 7.81 |
— |
401KG134-X |
How to Calculate Gear Ratio: Divide the number of teeth on the ring gear by the number of teeth on the pinion gear. This is the standard method used by Dana Spicer.
Casting & Assembly IDs
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Seal Retainer Casting: 454718K1
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Cap & Carrier Casting: 401CF102
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Cap Casting: 401CP100
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Finished Carrier Assembly: Dana 401CS101-X
Recommended Lubricant
Use Dana FE 75W-90 Fuel-Efficient Synthetic Gear Lubricant (GL-5) or equivalent approved synthetic. Do not use conventional gear oil.
What’s Included
- Complete remanufactured Dana N-400 rear-rear carrier rebuilt to your requested ratio by Discount Parts Exchange - DPX
- Available with standard open differential or Detroit Locker (NoSPIN)
- Painted and tagged for installation
- 12-month unlimited-mileage parts-only warranty
- Tech support from DPX during installation and initial run-in
Core Exchange Policy
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Required: Like-for-like, complete, and rebuildable core
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Deductions may apply for: Cracked housings, burnt or missing internals, water or low-lube damage, or mismatched units
- Call for core return instructions
Shipping
- Ships via LTL motor freight to verified commercial addresses only
- Forklift or dock required (liftgate available upon request)
- No residential delivery
Image Disclaimer
Photos show an actual Dana N-400 rear-rear carrier from our inventory. Final appearance may vary by ratio, yoke, locker configuration, and casting revision.
Call to Order
Call Discount Parts Exchange - DPX for pricing and ratio availability: 419-522-3320
DPX Drivetrain Tools Hub
Free tools built by rebuilders for mechanics, drivers, and fleets:
Road Speed Calculator •
Gear Ratio Charts •
PTO Shimming Guide •
Full IPL Library →
Reference Documentation
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)
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