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:MeritorA40674-6-529 Gearset | Meritor-Rockwell-AxleTech | SSHR R155 | New PAI/Excel
A40674-6-529 | Meritor-Rockwell-AxleTech SSHR / R155 Gearset | 5.29 Ratio (37/7) | New Aftermarket (PAI/Excel) New aftermarket ring...Regular price $1,274.47 USDSale price $1,274.47 USD Regular priceUnit price per$1,874.47 USDSale -
Vendor:MeritorA40674-1-529 Gearset | Meritor-Rockwell-AxleTech SSHR R155 37-7 | New Genuine
A40674-1-529 | Meritor-Rockwell-AxleTech SSHR / R155 Gearset | 5.29 Ratio (37/7) | New Genuine (NOS) New genuine Meritor-Rockwell-AxleTech...Regular price $1,447.47 USDSale price $1,447.47 USD Regular priceUnit price per$1,874.47 USDSale -
Vendor:MeritorA40306-1-683 Gearset | Meritor Rockwell AxleTech | SSHD 41-6 | Genuine OEM
A40306-1-683 | Meritor-Rockwell-AxleTech SSHD / 44K GAWR Gearset | 6.83 Ratio (41/6) | New Genuine (NOS) New genuine...Regular price $1,174.47 USDSale price $1,174.47 USD Regular priceUnit price per$1,874.47 USDSale -
Vendor:MeritorA40178-1-529 Gearset | Meritor Rockwell AxleTech | SSHD 5.29 Ratio (37-7) | New Italian
A40178-1 | Meritor-Rockwell-AxleTech SSHD-F / 44K GAWR Gearset | 5.29 Ratio (37/7) | New Aftermarket - Italian New...Regular price $1,147.74 USDSale price $1,147.74 USD Regular priceUnit price per$1,874.47 USDSale -
Vendor:MeritorA40172-1-463 Gearset | Meritor Rockwell AxleTech | SSHD Ratio 4.63 (37-8) | New Italian
A40172-1 | Meritor-Rockwell-AxleTech SSHD-F / 44K GAWR Gearset | 4.63 Ratio (37/8) | New Aftermarket - Italian New...Regular price $1,274.47 USDSale price $1,274.47 USD Regular priceUnit price per$1,874.47 USDSale -
Vendor:MeritorA40106-5-563 Gearset | Meritor-Rockwell-AxleTech | RR/RS23-160 | New OE
A40106-5 | Meritor-Rockwell-AxleTech RR23-160 / RS23-160 Gearset | 5.63 Ratio (45/8) | New OE New OE Meritor-Rockwell-AxleTech ring...Regular price $1,874.47 USDSale price $1,874.47 USD Regular priceUnit price per$3,843.60 USDSale -
Vendor:MeritorA39496-3-717 Gearset | Meritor-Rockwell-AxleTech | RS15-120 | New Aftermarket
A39496-3 | Meritor-Rockwell-AxleTech RS15-120 Gearset | 7.17 Ratio (43/6) | New Aftermarket New aftermarket Meritor-Rockwell-AxleTech ring & pinion...Regular price $1,147.74 USDSale price $1,147.74 USD Regular priceUnit price per$1,574.47 USDSale -
Vendor:MeritorA38988-4-373 Gearset | Meritor-Rockwell-AxleTech | RS15-120 | New Genuine
A38988-4 | Meritor-Rockwell-AxleTech RS15-120 / 15K GAWR Gearset | 3.73 Ratio (41/11) | New Genuine (NOS) New genuine...Regular price $1,374.47 USDSale price $1,374.47 USD Regular priceUnit price per$1,611.92 USDSale -
Vendor:MeritorA38818-1-5.38 Gearset | Meritor Rockwell AxleTech | H172 R5.38 | Genuine OEM
A38818-1 | Meritor-Rockwell-AxleTech H172 Gearset | 5.38 Ratio (43/8) | New Genuine (NOS) New genuine Meritor-Rockwell-AxleTech ring &...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price per -
Vendor:MeritorA38280-2-557 Gearset | Meritor-Rockwell-AxleTech | F106 | New Genuine
A38280-2 | Meritor-Rockwell-AxleTech F106 Gearset | 5.57 Ratio (39/7) | New Genuine New genuine Meritor-Rockwell-AxleTech ring & pinion...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price per -
Vendor:MeritorA38128-1-614 Gearset | New Take-Off Genuine Meritor-Rockwell-AxleTech F106
A38128-1 | Meritor-Rockwell-Axletech Gearset | F106 | 6.14 Ratio | New Take-Off Genuine A38128-1 is a New Take-Off...Regular price $1,447.74 USDSale price $1,447.74 USD Regular priceUnit price per -
Vendor:MeritorA37428-2-463 Gearset | Meritor-Rockwell-AxleTech | F106 | New Take-Off OEM
A37428-2 | Meritor-Rockwell-AxleTech F106 Gearset | 4.63 Ratio (37/8) | New Take-Off Genuine New Take-Off genuine Meritor-Rockwell-AxleTech ring...Regular price $1,747.74 USDSale price $1,747.74 USD Regular priceUnit price per$2,474.47 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.