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-FullerA4491 A-4491 Aftermarket Fuller 13-Speed "Puck" Style Knob | New, Not Plastic | Heavy-Duty Machined Aluminum
A-4491 Aftermarket Fuller 13-Speed “Puck” Style Knob — Machined Aluminum (Not Plastic) The A-4491 vintage-style shift knob/valve is...Regular price $43.74 USDSale price $43.74 USD Regular priceUnit price per$57.47 USDSale -
Vendor:Dana Light DutyDana 80 Carrier Housing — No Tubes, Cover, or Internals | ~3.930" I.D. | Cross-Ref 286CC102-17X
Dana 80 Carrier Housing — Center Section Only | ~3.930" Tube I.D. | Used OEM Dana 80 center...Regular price $327.47 USDSale price $327.47 USD Regular priceUnit price perSold out -
Vendor:Eaton / Dana Heavy Axle40635 | Eaton / Dana-Spicer 12V 2-Speed Diff Lock Motor | New OEM (NOS)
40635 Eaton Dana 2-Speed Motor | 12V Electric Diff Lock | 113743 | Fasco 2807-508-021 | New Genuine...Regular price $187.74 USDSale price $187.74 USD Regular priceUnit price per -
Vendor:Eaton / Dana Heavy Axle360KG110-X Dana Gearset | S135 S150 G360CA| 6.14 Ratio | NewGenuine
360KG110X Dana Gearset | S135 S150 G360CA | 6.14 Ratio | New Genuine The 360KG110X is a New...Regular price $974.47 USDSale price $974.47 USD Regular priceUnit price per$1,347.74 USDSale -
Vendor:MeritorA35618-5 Gearset | New Genuine Meritor Rockwell AxleTech Q100, Q145 Ratio 6.83
A35618-5 Gear Set | Rockwell Meritor Q100 Q145 | New Genuine 6.83 Ratio This new genuine OEM ring...Regular price $1,747.74 USDSale price $1,747.74 USD Regular priceUnit price perSold out -
Vendor:Spicer Transmission98-30-5 Spicer 1241 Power Tower Gear SX98-30-5 | TTC Tremec | New Genuine
98-30-5 Spicer 1241 Power Tower Gear – TTC / Tremec – New Genuine The 98-30-5 Power Tower Gear...Regular price $464.74 USDSale price $464.74 USD Regular priceUnit price per -
Vendor:Eaton-Fuller4303556 Eaton Fuller Super 10 Forward Housing Shift Lever | New OEM Genuine | Tall Shift Lever
4303556 Eaton Fuller Super 10 Forward Housing Shift Lever – New OEM Genuine – S2283 Tall/High – 11.250”...Regular price $197.47 USDSale price $197.47 USD Regular priceUnit price per$274.47 USDSold out Sale -
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:Meritor3891Q1629 Meritor Rockwell Axletech Planetary Spur Gear | T2111 Transfer Case | Genuine OEM
3891Q1629 Meritor Rockwell Axletech Planetary Spur Gear – Genuine OEM (New) Product Summary:Genuine Meritor / Rockwell / Axletech...Regular price $277.47 USDSale price $277.47 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) Product Summary New Genuine ring...Regular price $447.74 USDSale price $447.74 USD Regular priceUnit price per$475.00 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.