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:truckparts4u.com6590594 | GM Delco Oil Pump Kit | A/C Gear Application | New Genuine OEM (NOS)
6590594 | GM Delco Oil Pump Kit | A/C Gear Application | New Genuine OEM (NOS) Product SummaryPart...Regular price $21.47 USDSale price $21.47 USD Regular priceUnit price per -
Vendor:truckparts4u.com63-35-47-1X Dana Spicer TTC Input Shaft | CM60 Series Transmission | New Genuine (NOS)
63-35-47-1X Dana Spicer TTC Input Shaft – CM60 Series Transmission – New Genuine (NOS) The 63-35-47-1X Dana Spicer...Regular price $374.47 USDSale price $374.47 USD Regular priceUnit price per$424.74 USDSale -
Vendor:truckparts4u.com63-35-38-1X Dana Spicer TTC Input Shaft CM60 Series | New Genuine (NOS)
63-35-38-1X Dana Spicer TTC Input Shaft – CM60 Series Transmission – New Genuine (NOS) The 63-35-38-1X Dana Spicer...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:truckparts4u.com63-35-21-1X Dana Spicer TTC Input Shaft CM60 Series | New Genuine (NOS)
63-35-21-1X Dana Spicer TTC Input Shaft – CM60 Series Transmission – New Genuine (NOS) The 63-35-21-1X Dana Spicer...Regular price $347.74 USDSale price $347.74 USD Regular priceUnit price per$395.00 USDSale -
Vendor:truckparts4u.com62-35-98 Dana Spicer TTC Input Shaft 6000 Series Trans | New Genuine (NOS)
62-35-98 Dana Spicer TTC Input Shaft 6000 Series Trans – New Genuine (NOS) The 62-35-98 Dana Spicer TTC...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:truckparts4u.com62-35-96 Dana Spicer TTC Input Shaft 6000 Series | New Genuine (NOS)
62-35-96 Dana Spicer TTC Input Shaft – 6000 Series Transmission – New Genuine (NOS) Product Summary:New genuine Dana...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:Detroit Locker597248C91 Gearset | International RA474, RA57, W230, 3.73 Ratio – Genuine Dana Spicer
Product Summary Part Number: 597248C91Brand: International / DanaCondition: NewApplication: W230S, W460, RA474Ratio: 3.73 Key Features/Specifications Ring Gear: 483441C1...Regular price $947.74 USDSale price $947.74 USD Regular priceUnit price per -
Vendor:truckparts4u.com56-35-18 Dana Spicer TTC Input Shaft 56-35-6-1X | New Take-Off Genuine
56-35-18 Dana Spicer TTC Input Shaft 56-35-6-1X – New Take-Off Genuine The 56-35-18 Dana Spicer TTC input shaft...Regular price $474.47 USDSale price $474.47 USD Regular priceUnit price per$545.32 USDSale -
Vendor:truckparts4u.com56-30-3 Dana Spicer TTC Countershaft ES56-5A | New Genuine (NOS)
56-30-3 Dana Spicer TTC Countershaft ES56-5A – New Genuine (NOS) The 56-30-3 Dana Spicer TTC Countershaft (ES56-5A) is...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:truckparts4u.com53-35-4-1X Spicer / TTC Input Shaft | New Genuine
53-35-4-1X Spicer / TTC Input Shaft — New Genuine The 53-35-4-1X Dana Spicer / TTC input shaft is...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:truckparts4u.com53-35-20-1X | Spicer / TTC Input Shaft | New Genuine
53-35-20-1X Spicer / TTC Input Shaft — New Genuine The 53-35-20-1X Dana Spicer / TTC input shaft is...Regular price $395.00 USDSale price $395.00 USD Regular priceUnit price per -
Vendor:truckparts4u.com53-35-19-1X | Spicer / TTC Input Shaft | New Genuine
53-35-19-1X Spicer / TTC Input Shaft — New Genuine The 53-35-19-1X Dana Spicer / TTC input shaft is...Regular price $347.74 USDSale price $347.74 USD Regular priceUnit price per$395.00 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.