Collection: All Gearing | Dana Spicer, Meritor, Rockwell, Eaton | NOS & OEM Heavy-Duty Gears
All Gearing – Heavy-Duty Differential & Transmission Gears
Shop a massive selection of heavy-duty ring & pinion gearsets, axle gears, side gears, spider gears, and transmission gears. We stock New Genuine, New Old Stock (NOS), and quality take-out gearing from Dana Spicer, Meritor, Rockwell, AxleTech, Eaton Fuller, and more.
Whether you need to rebuild a differential, change gear ratio for better pulling power or fuel economy, or replace worn transmission gears, Discount Parts Exchange has the right gearing in stock and ready to ship from Mansfield, Ohio.
Why Shop DPX Gearing?
- Hard-to-Find NOS & Genuine OEM Parts — Many no longer available from dealers
- Popular Applications — Dana S135, S150, DS/RS series, Meritor 140/145/160 series, Eaton Fuller transmissions, and more
- Expert Support — Not sure what ratio or part you need? Send us your axle tag or BOM number — we’ll help you get the right gearset fast
Call our drivetrain specialists at 419-522-3320 for compatibility help and availability.
DPX Drivetrain Tools Hub
Free tools built by rebuilders for truckers and fleets — Road Speed & Ratio Calculator, gear ratio comparison charts, and full IPL library.
Open DPX Drivetrain Tools Hub →
Heavy-Duty Solutions — Built to Perform. Trusted to Last. Discount Parts Exchange (DPX) — Since 1997.
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Vendor:Eaton / Dana Heavy Axle390KG120-X Gearset | Dana Spicer S400 R3.54 | International 2500209C91 | New
390KG120-X | Dana Spicer S400 Rear Gear Set | 3.54 Ratio – New Genuine (NOS) 390KG120-X (International cross...Regular price $1,174.47 USDSale price $1,174.47 USD Regular priceUnit price per$1,574.47 USDSale -
Vendor:Eaton / Dana Heavy Axle390KG106-X Gearset | Dana Spicer S400F R3.91, International 2500160C91 – New
390KG106-X | Dana Spicer S400F Rear Gear Set | 3.91 Ratio – New Genuine (NOS) 390KG106-X (International cross...Regular price $1,174.47 USDSale price $1,174.47 USD Regular priceUnit price per$1,574.47 USDSale -
Vendor:Eaton / Dana Heavy Axle390KG102-X Gearset | Used Dana Spicer S400-R 3.07 Ratio | International 2500158C91
390KG102-X-U | Dana Spicer S400-R Ring & Pinion Gear Set | 3.07 Ratio – Used 390KG102-X-U (International cross...Regular price $847.74 USDSale price $847.74 USD Regular priceUnit price per$1,147.74 USDSale -
Vendor:Eaton / Dana Heavy Axle390DU103 Flange Half | Dana Spicer S400 | Ratio 3.21–3.73 | NOS - Genuine
390DU103 | Dana Spicer S400 Differential Flange Half | Casting 390DU102 – New Genuine (NOS) 390DU103 (casting 390DU102)...Regular price $177.47 USDSale price $177.47 USD Regular priceUnit price per -
Vendor:Meritor3892Z4940 Planetary Gear | Meritor-Rockwell-Axle Tech | Genuine
3892Z4940 | Meritor-Rockwell-AxleTech Planetary Gear | New Genuine (NOS) New genuine Meritor / Rockwell / AxleTech planetary gear...Regular price $347.47 USDSale price $347.47 USD Regular priceUnit price per -
Vendor:Meritor3892Z1768 Spur Gear | Meritor-Rockwell-AxleTech | Genuine (NOS)
3892Z1768 | Meritor-Rockwell-AxleTech Spur Gear | New Genuine (NOS) New genuine Meritor / Rockwell / AxleTech spur gear...Regular price $947.47 USDSale price $947.47 USD Regular priceUnit price per -
Vendor:Meritor3892W4937 RP23-180 Pump Drive Gear | Meritor-Rockwell-AxleTech | Genuine
3892W4937 | Meritor-Rockwell-AxleTech RP23-180 Pump Drive Gear | New Genuine (NOS) Genuine Meritor / Rockwell / AxleTech RP23-180...Regular price $747.47 USDSale price $747.47 USD Regular priceUnit price per -
Vendor:Meritor3892U2205 Spur Gear | Meritor-Rockwell-AxleTech | Genuine (NOS)
3892U2205 | Meritor-Rockwell-AxleTech Spur Gear | New Genuine (NOS) The 3892U2205 is a new genuine Meritor / Rockwell...Regular price $947.47 USDSale price $947.47 USD Regular priceUnit price per -
Vendor:Meritor3892R1734 Meritor-Rockwell-Axletech Spur Gear | New Genuine
3892R1734 | Meritor-Rockwell-AxleTech Spur Gear | T226 Transfer Case | New Genuine (NOS) New genuine Meritor-Rockwell-AxleTech spur gear...Regular price $547.47 USDSale price $547.47 USD Regular priceUnit price per -
Vendor:truckparts4u.com3892P2434 Spur Gear | Genuine Meritor Rockwell Axle Tech (NOS)
3892P2434 | Meritor-Rockwell-AxleTech Spur Gear | New Genuine (NOS) Genuine Meritor-Rockwell-AxleTech spur gear 3892P2434. New old stock (NOS)...Regular price $597.47 USDSale price $597.47 USD Regular priceUnit price per -
Vendor:Meritor3892F2424 Spur Gear | Meritor-Rockwell-AxleTech | Genuine (NOS)
3892F2424 | Meritor-Rockwell-AxleTech Spur Gear | New Genuine (NOS) New Genuine Meritor / Rockwell / AxleTech 3892F2424 —...Regular price $247.47 USDSale price $247.47 USD Regular priceUnit price per -
Vendor:Meritor3892E3619 Meritor Rockwell Axletech Spur Gear | Genuine OEM
3892E3619 | Meritor-Rockwell-AxleTech Spur Gear | New Genuine (NOS) Genuine Meritor / Rockwell / AxleTech spur gear 3892E3619....Regular price $517.47 USDSale price $517.47 USD Regular priceUnit price per
Your #1 Source for Remanufactured Transmissions, Differentials, Transfer Cases & PTOs — Since 1997
Trusted by Fleets & Technicians for Over 25 Years
Discount Parts Exchange delivers quality, reliability, and value in every drivetrain component. Backed by decades of hands-on experience, our heavy-duty solutions are built to keep your truck running.