RD20-145 | Meritor Forward Rear Differential | Power Divider | Remanufactured

RD20-145 | Meritor / Rockwell Forward Rear Differential with Power Divider — Remanufactured by DPX (40K GAWR)

The Meritor / Rockwell RD20-145 (also known as RD20145) is a heavy-duty forward-rear tandem differential with integrated power divider, commonly used in Class 8 trucks. Remanufactured in Mansfield, Ohio by Discount Parts Exchange - DPX. Every unit is torn down, cleaned, inspected, and rebuilt to your exact ratio using quality bearings, seals, and gears. This carrier is part of the popular 20-145 axle family, often badged under Meritor, Rockwell, Axletech, and Cummins.

Pairs with the RR20-145 Meritor / Rockwell rear-rear differential to form a complete tandem set.

Highlights

• Brand / Family: Meritor / Rockwell / Axletech 20-145 Series
• Model: RD20-145 (Forward-Rear with Power Divider)
• GAWR: 40,000 lb
• Design: Single-reduction helical gearset with matched ring & pinion and integrated power divider
• Position: Forward-rear (drives the rear-rear axle via inter-axle shaft)
• Common Casting Numbers: 3200F1644, 3200K1623, 3200Q1889
• Applications: Over-the-road, line-haul, dump truck, mixer, and heavy-haul fleets
• Dry Weight: ~441 lb
• Warranty: 12-month, unlimited mileage (parts-only)

Available Gear Ratios & Meritor Part Numbers (RD20-145 Forward Rear)

What’s Included

• Remanufactured Meritor / Rockwell RD20-145 forward-rear carrier assembly (rebuilt to your requested ratio) by Discount Parts Exchange - DPX
• 12-month, unlimited-mileage parts-only warranty
• Technical support from DPX during installation and break-in

Fitment Notes

• Fits tandem-drive trucks equipped with the Meritor / Rockwell / Axletech 20-145 axle family
• Forward-rear position with power divider — pairs with RR20-145 (rear-rear carrier)
• Common on International, Navistar, Freightliner, Kenworth, Peterbilt, and many other heavy-duty applications

Image Disclaimer

Photos shown are representative; final appearance may vary by ratio and casting revision.

Call to Order

Call Discount Parts Exchange - DPX for current pricing and ratio availability: 419-522-3320

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Illustrated Parts List (IPL) Reference

For detailed exploded-view diagrams, part numbers, and component identification, download the official Meritor RD20-145 / RR20-145 Illustrated Parts List (PF-9147).
📄 Download RD20-145 / RR20-145 Illustrated Parts List (PDF)

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