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:Meritor3892D4554 Meritor Rockwell Axletech Drive Gear | Genuine OEM New Take-Off
3892D4554 | Meritor-Rockwell-AxleTech Drive Gear | New Genuine Take-Off (NOS) New genuine take-off Meritor / Rockwell / AxleTech...Regular price $174.47 USDSale price $174.47 USD Regular priceUnit price per -
Vendor:truckparts4u.com3892D3618 Meritor-Rockwell-Axletech Spur Gear | Genuine OEM
3892D3618 | Meritor-Rockwell-AxleTech Spur Gear | New Genuine (NOS) New Genuine Meritor / Rockwell / AxleTech 3892D3618 —...Regular price $517.47 USDSale price $517.47 USD Regular priceUnit price per -
Vendor:Meritor3892D1772 Meritor-Rockwell-Axletech Spur Gears T226 T-Case | New Genuine
3892D1772 | Meritor-Rockwell-AxleTech Spur Gears | T226 Transfer Case | New Genuine (NOS) New genuine Meritor-Rockwell-AxleTech spur gears...Regular price $547.47 USDSale price $547.47 USD Regular priceUnit price per -
Vendor:Meritor3892A4473 Meritor-Rockwell-Axletech M923/M939 Helical Gears | New Genuine
3892A4473 | Meritor-Rockwell-AxleTech Helical Gear | M923 / M939 Transfer Case | New Genuine (NOS) New genuine Meritor...Regular price $124.47 USDSale price $124.47 USD Regular priceUnit price per -
Vendor:Meritor3891U1087 Meritor Rockwell Axletech L-345 Helical Pinion Gear | Genuine OEM
3891U1087 | Meritor-Rockwell-AxleTech L-345 Helical Pinion Gear | 16-Tooth | New Genuine (NOS) New genuine Meritor / Rockwell...Regular price $547.47 USDSale price $547.47 USD Regular priceUnit price per -
Vendor:Meritor3891F942 Meritor Rockwell Axletech Helical Gear | L340 Fast Ratio | Genuine OEM
3891F942 | Meritor-Rockwell-AxleTech L340 Helical Gear | Fast Ratio | New Genuine (NOS) New genuine Meritor / Rockwell...Regular price $347.74 USDSale price $347.74 USD Regular priceUnit price per -
Vendor:Meritor3802S1059 Axle Shaft | Meritor-Rockwell-Axletech | 17.62" Length | New Genuine
3802S1059 | Meritor-Rockwell-AxleTech Axle Shaft | 17.62" Length | New Genuine (NOS) New genuine Meritor / Rockwell /...Regular price $1,174.47 USDSale price $1,174.47 USD Regular priceUnit price per -
Vendor:Spicer Transmission37-35-12-1X Spicer / TTC Input Shaft | New Genuine (NOS)
37-35-12-1X Spicer / TTC Input Shaft — New Genuine (NOS) The 37-35-12-1X Spicer / TTC input shaft is...Regular price $247.74 USDSale price $247.74 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle360SR104-1 Axle Shaft | Dana Spicer | S135 S150 G360CA | 36 Spline | New Genuine Take-Out
360SR104-1 | Dana Spicer S135 S150 Rear Axle Shaft | 36 Spline | New Genuine Take-Out 360SR104-1 (also...Regular price $474.47 USDSale price $474.47 USD Regular priceUnit price per$1,280.85 USDSale -
Vendor:Eaton / Dana Heavy Axle360KG120-X Gearset | Dana Spicer | S135 S150 G360CA | 5.38 Ratio | New Genuine
360KG120X | Dana Spicer Gearset | S135 / S150 / G360CA | 5.38 Ratio | New Take-Out New...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price perSold out -
Vendor:Eaton / Dana Heavy Axle360KG105-X-U Gearset | Dana Spicer | S135 S150 G360CA | 3.91 Ratio | Used Genuine
360KG105X-U | Dana Spicer Gearset | S135 / S150 / G360CA | 3.91 Ratio | Used Ring &...Regular price $974.44 USDSale price $974.44 USD Regular priceUnit price per$1,147.74 USDSale -
Vendor:Eaton / Dana Heavy Axle360KG102-X Gearset | Dana Spicer | S135 S150 G360CA | 3.38 Ratio | New Genuine
360KG102X | Dana Spicer Gearset | S135 / S150 / G360CA | 3.38 Ratio | New Genuine New...Regular price $947.74 USDSale price $947.74 USD Regular priceUnit price per$1,347.74 USDSale
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.