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:Eaton / Dana Heavy Axle113595 | Eaton Dana-Spicer Sun Gear for 26321 / 35327 | New Genuine
113595 Dana Spicer Sun Gear — 23221 / 23321 / 26321 / 35327 Axles | New Genuine OEM...Regular price $267.47 USDSale price $267.47 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle111351 Gearset | Dana Eaton RS480, 3.55 Ratio – New (NOS) Genuine Eaton
111351 Dana Eaton Gear Set — 3.55 Ratio | RS480 / 44RS / 23120-1 Axles | New Take-Off...Regular price $1,574.47 USDSale price $1,574.47 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle110807, 110808 | Dana Spicer Eaton DS402-P Input Retainer | New (NOS) Genuine
110807 110808 Dana Spicer Input Retainer — DS381-P / DS402-P | Casting 110806 | New (NOS) This genuine...Regular price $74.74 USDSale price $74.74 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle110150, 0110150 | Eaton Dana Spicer Momentary Switch Assembly | New (NOS) Genuine
110150 Dana Spicer Momentary Switch | 0110150 | Eaton Axle & Transmission | New (NOS) OEM This genuine...Regular price $97.47 USDSale price $97.47 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.