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:Spicer Transmission46-362-16 Dana Spicer, TTC | 311660X Mainshaft Kit | New Genuine (NOS)
46-362-16 Dana Spicer / TTC Mainshaft — 5000 Series — New Genuine (NOS) The 46-362-16 Dana Spicer /...Regular price $495.00 USDSale price $495.00 USD Regular priceUnit price per -
Vendor:Spicer Transmission46-35-65 Dana Spicer TTC Input Shaft | 5000 Series | New Genuine (NOS)
46-35-65 Dana Spicer / TTC Input Shaft — 5000 Series — New Genuine (NOS) The 46-35-65 input shaft...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:Spicer Transmission46-35-49 Dana Spicer TTC Input Shaft | 5000 Series 5652 | New Genuine (NOS)
46-35-49 Dana Spicer / TTC Input Shaft — 5000 Series 5652 — New Genuine (NOS) The 46-35-49 input...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:Spicer Transmission46-35-104 Dana Spicer TTC Input Shaft | 5000 Series 5752C, 5753A | New Genuine (NOS)
46-35-104 Dana Spicer / TTC Input Shaft — 5000 Series — New Genuine (NOS) The 46-35-104 input shaft...Regular price $225.00 USDSale price $225.00 USD Regular priceUnit price per -
Vendor:Spicer Transmission46-35-103 Dana Spicer TTC Input Shaft | 5000 Series | New Genuine (NOS)
46-35-103 Dana Spicer / TTC Input Shaft — 5000 Series — New Genuine (NOS) The 46-35-103 input shaft...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:Spicer Transmission46-30-12 Dana Spicer TTC Countershaft | 5000 Series | New Genuine (NOS)
46-30-12 Dana Spicer TTC Countershaft – 5000 Series – New Genuine (NOS) The 46-30-12 Dana Spicer TTC Countershaft...Regular price $495.00 USDSale price $495.00 USD Regular priceUnit price per -
Vendor:Fabco432-0668 | Fabco TC200 Transfer Case Gear | Navistar 1677313C1 | New Genuine (NOS)
432-0668 Fabco Intermediate Shaft Gear is a new (NOS) genuine replacement part for Fabco TC200 Transfer Cases. Also...Regular price $2,287.47 USDSale price $2,287.47 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle40638 | Eaton / Dana-Spicer 24V 2-Speed Diff Lock Motor | New OEM (NOS)
40638 | Eaton / Dana-Spicer 24V 2-Speed Diff Lock Motor | New Genuine (NOS) New Genuine Eaton /...Regular price $377.74 USDSale price $377.74 USD Regular priceUnit price per$497.65 USDSale -
Vendor:Eaton / Dana Heavy Axle401KG126-X Gearset | Genuine Dana/Spicer N400 Front R6.14, International 1665350C91
Product Summary Part Number: 1665350C91 / 401KG126-XCondition: NewBrand: SpicerAxle Model: N400 / N340Gear Ratio: 6.14Ring Gear Size: 15.500...Regular price $1,574.47 USDSale price $1,574.47 USD Regular priceUnit price perSold out -
Vendor:Spicer Transmission40-35-17-1X Dana Spicer | Tremec, TTC | Input Shaft | ES42-5 | New Genuine
40-35-17-1X | Dana Spicer TTC Input Shaft — ES42-5 — New Genuine The 40-35-17-1X Dana Spicer TTC input...Regular price $295.00 USDSale price $295.00 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle390KQ100X Dana Spicer S400 Differential Case Kit | Ratio 2.81–2.92 | New OEM
390KQ100X | Dana Spicer S400 Differential Case Kit | 2.81–2.92 Ratio – New Genuine (NOS) 390KQ100X is a...Regular price $524.47 USDSale price $524.47 USD Regular priceUnit price per$1,589.32 USDSale -
Vendor:Eaton / Dana Heavy Axle390KG213-X Gearset | Genuine Dana Spicer S400 Rear R3.21, International 2500199C91
390KG213-X | Dana Spicer S400 Rear Gear Set | 3.21 Ratio – New Genuine (NOS) 390KG213-X (International cross...Regular price $1,147.74 USDSale price $1,147.74 USD Regular priceUnit price per$1,574.74 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.