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.com98-30-9-1X Spicer Aux Countershaft 1241C / P1241C | New Aftermarket Replacement
98-30-9-1X Spicer Auxiliary Countershaft — 1241C / P1241C — New Aftermarket Replacement The 98-30-9-1X auxiliary countershaft is a...Regular price $447.74 USDSale price $447.74 USD Regular priceUnit price per -
Vendor:Detroit Locker95580 Gearset | Dana Eaton 44DS, DS480P, 4.88 Ratio – New Take-Off Genuine
95580 Dana Eaton Gearset | 44DS DS480-P | 4.88 Ratio | 78860 78839 | New Take-Out Product Summary:95580...Regular price $1,747.74 USDSale price $1,747.74 USD Regular priceUnit price per -
Vendor:Detroit Locker95577 Gearset | Dana Eaton 44DS, DS480P, 4.11 Ratio – New Take-Off Genuine
95577 Dana Eaton Gearset | 44DS DC480 | 4.11 Ratio | 78854 78833 | New Take-Out Product Summary:95577...Regular price $1,747.74 USDSale price $1,747.74 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle94378 | Eaton / Dana-Spicer 23105-C 39 Spline Axle Gears | New OEM
94378 (also listed as 094378) is a set of genuine Eaton/Dana-Spicer axle gears, designed for use in Eaton...Regular price $157.47 USDSale price $157.47 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle86784 | Eaton / Dana-Spicer DS480 A-Gears | 22 Spline | New Genuine
86784 Eaton Dana A-Gears | DS480 RS480 23121 23421 | 22 Spline | New Genuine Product Summary:86784 (also...Regular price $124.47 USDSale price $124.47 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle81470 | Eaton Dana-Spicer Oil Pump – 44DS, 44DT, 44DP Power Divider (New Genuine)
81470 Eaton Dana Oil Pump — 44DS / 44DT / 44DP Power Divider | 692576 / 421903C91 Cross...Regular price $387.47 USDSale price $387.47 USD Regular priceUnit price per -
Vendor:truckparts4u.com73-8-48 Spicer Auxiliary Transmission Mainshaft 2nd Gear | New Genuine
73-8-48 Spicer Auxiliary Transmission M/S Gear — Mainshaft Second Gear — New Genuine The 73-8-48 Spicer auxiliary transmission...Regular price $224.74 USDSale price $224.74 USD Regular priceUnit price per$347.47 USDSale -
Vendor:truckparts4u.com706248-4X Gearset | Dana D706248-4, Meritor/AxleTech, 7/41 R5.86 – Genuine
706248-4X Dana Spicer Gearset | R5.29 Ratio | 12.50" | Off-Highway | New Product Summary:Part Number: 706248-4X –...Regular price $774.47 USDSale price $774.47 USD Regular priceUnit price per -
Vendor:truckparts4u.com70-362-11 / 311624X Spicer Mainshaft | New Genuine | Spicer 8031
70-362-11 / 311624X Spicer Mainshaft — Spicer 8031 — New Genuine The 70-362-11 / 311624X Spicer mainshaft is...Regular price $474.47 USDSale price $474.47 USD Regular priceUnit price per -
Vendor:truckparts4u.com70-196-29 Spicer Countershaft 2nd Gear | Auxiliary Transmission | Used OEM
70-196-29 Spicer Countershaft 2nd Gear — R8341 Auxiliary Transmission — New Genuine The 70-196-29 Dana Spicer second-speed gear...Regular price $274.47 USDSale price $274.47 USD Regular priceUnit price per$347.74 USDSale -
Vendor:truckparts4u.com70-196-10 Spicer Countershaft 2nd Gear | Auxiliary Transmission | Used OEM
70-196-10 Spicer Countershaft 2nd Gear — Auxiliary Transmission — Used OEM The 70-196-10 Spicer auxiliary transmission gear is...Regular price $274.47 USDSale price $274.47 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle68909R94 Gear Set | Genuine International RA39, Dana F155/F170 7.80 Ratio
Product Summary Part Number: 68909R94Product: Dana, International – GenuineCompatibility: International RA39, Dana F155 & F170Tooth Count: 39/5Ratio: 7.80...Regular price $1,774.47 USDSale price $1,774.47 USD Regular priceUnit price per$1,974.47 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.