MD20-145 | Meritor Forward Rear Differential | MD40-14X | 40k | DPX Reman

MD20-145 | Meritor Forward Rear Differential with Power Divider — Remanufactured by DPX (40K GAWR) Heavy-duty forward-rear tandem differential with integrated power divider for Class 8 tractors. Remanufactured in Mansfield, Ohio by Discount Parts Exchange - DPX. The Meritor MD20-145 (also covers MD40-14X and MD20145 series) is the forward position unit that feeds the rear axle through the inter-axle shaft. Rebuilt to your exact ratio using upgraded components for improved reliability. Popular in Cummins-Meritor drivetrain applications. Also referenced as MD20145 (no dash). Call DPX to confirm: 419-522-3320. Highlights Model: MD20-145 / MD40-14X / MD20145 (forward rear with power divider) Axle Family: Meritor / Rockwell 20-145 (Cummins-Meritor) GAWR: 40,000 lb Design: Single-reduction; matched ring & pinion; integrated power divider with truck-controlled lock Input Shaft: 3297-D-1616 – 2.390" 46 spline Axle Gears: 2234-G-1437 – 2.100" 41 spline Input Nut: 40X-1233 or KIT2826 Input Seal: A1-1205-X-2728 (Multiple-Lip Seal) Requires Meritor seal driver 2728T1 and sleeve driver 2728T2 for proper installation DPX PRO TIP: We replace with R945007 seal, make sure to remove the wear sleeve from the end yoke, failure to do so will burn the seal Power Divider Upgrade: All units upgraded to redesigned KIT2936 cover to reduce leaks common on original design Position: Forward-rear (drives rear axle via inter-axle shaft) Applications: Over the road, dump truck, heavy haul, and Cummins-powered fleets Available Gear Ratios & Gearset Part Numbers MD20-145 / MD40-14X Forward Ratios Ratio Gearset Part Number 2.28 B-44570-1F-228 2.47 B-43498-1F-247 2.64 B-43500-1F-264 2.79 A-44440-1F-279 2.85 A-44524-1F-285 3.08 A-42200-1F-308 3.25 A-43502-1F-325 3.36 A-42202-1F-336 3.42 A-43752-1F-342 3.55 A-42204-1F-355 3.70 B-42206-1F-370 3.90 B-42180-1F-390 4.11 B-42128-1F-411 4.33 B-41278-1F-433 4.63 B-41280-1F-463 4.88 B-41282-1F-488 5.13 B-41284-1F-513 5.29 B-41284-1F-529 5.57 A-41466-1F-557 5.86 A-41468-1F-586 6.14 A-41470-1F-614 6.43 A-41472-1F-643 6.83 A-41472-1F-683 7.17 A-41474-1F-717 What’s Included Remanufactured Meritor MD20-145 / MD40-14X forward rear carrier assembly 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 Fits tandem-drive trucks equipped with the Meritor / Rockwell 20-145 axle family (Cummins-Meritor applications) Forward-rear position with power divider; pairs with RR20-145 rear-rear carrier Verify ratio and spline count 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.