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.comA35804-18-U Gearset | Used Aftermarket Meritor Rockwell AxleTech SQHD-Front R-7.20
A35804-18 Gearset | Rockwell Meritor SQHD Front | 7.20 Ratio | Used Product Summary:Part Number: A35804-18Brand: Rockwell /...Regular price $449.74 USDSale price $449.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35804-18 Gearset | Meritor Rockwell AxleTech SQHD Front R7.20 | New Aftermarket
A35804-18 Gearset | SQHD Front | Ratio 7.20 | 21 Spline | New Aftermarket The A35804-18 is a...Regular price $774.47 USDSale price $774.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35800-9-U Gearset | Used Meritor Rockwell AxleTech SQHR 8.60 Ratio
A35800 Rockwell Meritor Gearset | SQHD Rear-Rear | 8.60 Ratio | Used Product Summary:Part Number: A35800Brand: Rockwell /...Regular price $1,047.74 USDSale price $1,047.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35768-1-557 Gearset | Meritor Rockwell AxleTech SSHR R155 39-7 | New
A35768-1-557 Gearset | SSHR-R / R-155-R | 5.57 Ratio | New Genuine A35768-1-557 is a New Genuine OEM...Regular price $1,874.47 USDSale price $1,874.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35732-12 Gearset | New Aftermarket Meritor Rockwell AxleTech H172 6.17
A35732-12 Rockwell Meritor AxleTech Gearset H172-R6.17 | Used Ring & Pinion Product Summary:A35732-12 is a used ring and...Regular price $1,174.74 USDSale price $1,174.74 USD Regular priceUnit price perSold out -
Vendor:truckparts4u.comA35634-6 Gearset | New Aftermarket Meritor Rockwell AxleTech D100 R7.80
A35634-6 Gearset | Rockwell Meritor D100 | 7.80 Ratio | Aftermarket Product Summary:Part Number: A35634-6Brand: Rockwell / Meritor...Regular price $1,174.47 USDSale price $1,174.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35620-3 Gearset | Meritor Rockwell AxleTech Q100/Q145 R7.20 | Used
A35620-3 Gearset | Rockwell Meritor AxleTech Q100/Q145 | 7.20 Ratio | Used OEM A35620-3 is a Used Genuine...Regular price $1,147.74 USDSale price $1,147.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35618-5 Gearset | New Genuine Meritor Rockwell AxleTech Q100, Q145 Ratio 6.83
A35618-5 Gear Set | Rockwell Meritor Q100 Q145 | Used OEM 6/41 Ratio Product SummaryPart Number: A35618-5Brand: Rockwell...Regular price $1,747.74 USDSale price $1,747.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35602 Meritor-Rockwell-Axletech Ring & Pinion Set | H162 5.29 Ratio | Aftermarket Replacement for A35776-2
A35602 Meritor-Rockwell-Axletech Ring & Pinion Set, H162 5.29 Ratio – New Aftermarket Replacement for A35776-2 Product Summary:This new...Regular price $897.47 USDSale price $897.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35514-6-U-RGC Gearset | Used Genuine Meritor Rockwell AxleTech D100 R5.83
A35514-6 Rockwell Meritor Gear Set | 5.83 Ratio | D100 Axle | Used OEM A35514-6 is a used...Regular price $1,174.47 USDSale price $1,174.47 USD Regular priceUnit price per$1,374.47 USDSale -
Vendor:truckparts4u.comA35514-6-U Gearset | Used Genuine Meritor Rockwell AxleTech D100 R5.83
A35514-6 Rockwell Meritor Gearset | D100 Axle | 5.83 Ratio | Used Genuine Product Summary:Part Number: A35514-6Brand: Rockwell...Regular price $874.47 USDSale price $874.47 USD Regular priceUnit price perSold out -
Vendor:Eaton / Dana Heavy Axle98113 Gearset | Euroricambi, Dana, Eaton RT480, 6.17/8.40 Ratio – New (NOS)
98113 Euroricambi Gearset — Eaton Axles | 6.17 / 8.40 Ratio (37/6) | 53171 Ring / 53172 Pinion...Regular price $1,974.47 USDSale price $1,974.47 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.