Collection: All Gearing – Discount Parts Exchange Since 1997
Heavy-Duty Differential & Transmission Gearing
Shop our complete selection of heavy-duty gear sets for Class 6, 7, and 8 trucks. We stock differential ring & pinion sets, axle gearing kits, and transmission gears from leading OEMs like Dana Spicer, Eaton, Meritor, and Rockwell. Whether you need to rebuild, re-gear, or upgrade for torque, economy, or hauling power, these genuine and aftermarket gear sets are built to perform under the toughest conditions.
Gearing Options
- Differential Gearing: OEM ring & pinion sets, matched gear pairs, spider and side gears for popular models including Dana S135, S150, DS/RS404, and Meritor 145/160 series.
- Transmission Gears: Mainshaft, countershaft, splitter, and auxiliary gears for Eaton Fuller transmissions and more.
- Condition Choices: New Old Stock (NOS), verified take-out assemblies, and premium aftermarket gearing.
Why Choose Our Gear Sets
- Application-specific expertise: Ratio recommendations for engine, tire size, and duty cycle.
- Quality assurance: Each gear inspected for wear, tooth pattern, and OEM compatibility.
- Fast shipping: U.S. warehouse in Mansfield, Ohio — international shipping available.
Fitment Help
Not sure which gearset fits your axle or transmission? Provide us your axle tag, BOM, or transmission model number — we’ll confirm the correct ratio and part number before shipping. Call 419-522-3320 for expert support.
Heavy-Duty Solutions — Built to Keep Your Drivetrain Moving.
Built to Perform. Trusted to Last.
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Vendor:Spicer Transmission40-35-21-1X Dana Spicer TTC Input Shaft | ES42-5 | New Genuine
40-35-21-1X Dana Spicer TTC Input Shaft — ES42-5 — New Genuine The 40-35-21-1X Dana Spicer TTC input shaft...Regular price $295.00 USDSale price $295.00 USD Regular priceUnit price perSold out -
Vendor:Spicer Transmission40-35-16-1X Dana Spicer TTC Input Shaft | ES42-5 | New Genuine
40-35-16-1X Dana Spicer TTC Input Shaft — CM4054 Series — New Genuine The 40-35-16-1X Dana Spicer TTC input...Regular price $295.00 USDSale price $295.00 USD Regular priceUnit price per -
Vendor:Meritor3880F708 Meritor Rockwell Thru Shaft | Genuine OEM
3880F708 Meritor Rockwell Thru Shaft – Genuine OEM Product Summary:Genuine Meritor Rockwell Axle Tech Thru Shaft, part number...Regular price $274.47 USDSale price $274.47 USD Regular priceUnit price perSold out -
Vendor:GM3785597 | GM H052 / HO52 Gear Set – 4.57 Ratio (1949–1972 Trucks, NOS)
3785597 | GM H052 / HO52 Gear Set | 4.57 Ratio | New Genuine (NOS) New Genuine ring...Regular price $494.74 USDSale price $494.74 USD Regular priceUnit price per$544.74 USDSale -
Vendor:truckparts4u.com3785597 | GM H052 / HO52 Gear Set – 4.57 Ratio (1949–1972 Trucks, Aftermarket NOS)
3785597 | GM H052 / HO52 Gear Set | 4.57 Ratio | New Aftermarket (NOS) New Old Stock...Regular price $397.74 USDSale price $397.74 USD Regular priceUnit price per$494.75 USDSale -
Vendor:Eaton / Dana Heavy Axle360KG107-X Gear Set | Genuine OEM Dana S135/S150 4.44 Ratio
360KG107X | Dana Spicer Gearset S135 S150 G360CA | 4.44 Ratio | 1695924C91 | New Genuine The 360KG107X...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle360KG105-X Gear Set | Genuine OEM Dana S135/S150 3.91 Ratio
360KG105X | Dana Spicer Gearset S135 S150 G360CA | 3.91 Ratio | 1695922C91 | New Genuine The 360KG105X...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price perSold out -
Vendor:truckparts4u.comHO52 / H052 Reconditioned GM Eaton Differential Carrier – 4.57 Ratio | 1949-72 Vintage
Reconditioned GM Eaton HO52 / H052 Differential Carrier – Original 4.57 OEM Ratio Reconditioned GM Eaton HO52 /...Regular price $2,995.00 USDSale price $2,995.00 USD Regular priceUnit price per$3,495.00 USDSale -
Vendor:MeritorA36162-1-5.83 Gearset | Meritor-Rockwell-Axletech F106-R5.83 | New Aftermarket
A36162-1 | Meritor Rockwell AxleTech Ring & Pinion Gearset | F106 R5.83 | New Aftermarket New aftermarket Meritor...Regular price $1,247.47 USDSale price $1,247.47 USD Regular priceUnit price per$1,647.74 USDSale -
Vendor:Eaton / Dana Heavy Axle360KG103-X Gear Set | Genuine OEM Dana S135/S150 3.54 Ratio
360KG103X | Dana Spicer Gearset S135 S150 G360CA | 3.54 Ratio | 1695920C91 | New Genuine The 360KG103X...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price per -
Vendor:The Reman Center, Inc.FS6406A Eaton Fuller 6-Speed Transmission | 660 lb-ft | Dual PTO | DPE Reman (Exchange)
FS6406A | Eaton Fuller 6-Speed Transmission — Remanufactured by DPX The Eaton Fuller FS6406A is a 6-speed, single-countershaft...Regular price $0.00 USDSale price $0.00 USD Regular priceUnit price per -
Vendor:The Reman Center, Inc.FS5406A Eaton Fuller 6-Speed Transmission | Single Countershaft | Reman by DPX (FS5406)
FS5406A | Eaton Fuller 6-Speed Transmission (Single Countershaft) — Remanufactured by DPX The Eaton Fuller FS5406A is a...Regular price $0.00 USDSale price $0.00 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.