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.comA40172-1-463 Gearset – SSHD Ratio 4.63 (37-8) | Meritor Rockwell AxleTech | New Italian
A40172-1F Gear Set | 4.63 Ratio | SSHD-F Forward Rear | Global Drivetrain | New Aftermarket A40172-1F is...Regular price $1,874.47 USDSale price $1,874.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA40106-5 Gearset | New OE Meritor Rockwell AxleTech RR/RS23-160 R5.63
A40106-5 Gear Set | Rockwell Meritor RR23-160 RS23-160 | Used OEM 8/45 Ratio Product SummaryPart Number: A40106-5Brand: Rockwell...Regular price $1,874.47 USDSale price $1,874.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA39496-3 Gearset | New Aftermarket Meritor Rockwell AxleTech RS15-120 Ratio 7.17
A39496-3 Aftermarket Gearset RS15-120 R7.17 | New Ring & Pinion for Rockwell Meritor AxleTech Product Summary:A39496-3 is a...Regular price $1,147.74 USDSale price $1,147.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA38988-4 Gearset | New Genuine Meritor Rockwell AxleTech RS15-120 R-3.73
A389884 Gear Set | Rockwell Meritor RS15-120 | New 3.73 Ratio 41/11 | 1694442C91 Product SummaryPart Number: A389884Brand:...Regular price $1,374.47 USDSale price $1,374.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA38818-1 Gearset | Meritor Rockwell AxleTech H172 R5.38 | Genuine OEM
A38818-1 Gearset | Rockwell Meritor AxleTech H172 | 5.38 Ratio | New Genuine A38818-1 is a New Genuine...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA38280-2 Gearset | New Genuine Meritor Rockwell AxleTech F106 R-5.57
A38280-1, A38280-2 Rockwell Meritor AxleTech Gearset F106-R5.57 | Used Ring & Pinion Product Summary:A38280-1 and A38280-2 refer to...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA38128-1 Gearset | New Take-Off Genuine Meritor Rockwell AxleTech F106 R-6.14
A38128-1 Rockwell Meritor AxleTech Gearset F106-R6.14 | Genuine Ring & Pinion Product Summary:A38128-1 is a genuine ring and...Regular price $1,447.74 USDSale price $1,447.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA37428-2-463 Meritor Rockwell F106 Gearset 4.63 Ratio | 8-37 | New Take-Off Genuine
A37428-2 Gearset | Rockwell Meritor AxleTech F106 | 4.63 Ratio | 10-Spline | New Take-Off OEM A37428-2 is...Regular price $1,747.74 USDSale price $1,747.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA36802-4 Gearset | New Genuine Meritor Rockwell AxleTech SQHD-Front R-8.20
A36802-4 Gear Set | Rockwell Meritor SQHD Front | Used 8.20 Ratio 41/5 | 2.00" 21 Spline Product...Regular price $1,347.74 USDSale price $1,347.74 USD Regular priceUnit price per -
Vendor:truckparts4u.comA36684-5 Gearset | New Meritor Rockwell AxleTech R-155 R4.89 | Replaced by A40176-9
A36684-5 Rockwell Meritor AxleTech Gearset | R155 (RH) | 4.89 Ratio | New Product Summary:Part Number: A36684-5Brand: Rockwell...Regular price $1,274.47 USDSale price $1,274.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA36612-1 Gearset | Meritor Rockwell AxleTech H162 Ratio 4.63 | New
A36612-1 Gearset | Rockwell Meritor AxleTech H162/L145 | 4.63 Ratio | 10 Spline | New Genuine A36612-1 is...Regular price $1,247.47 USDSale price $1,247.47 USD Regular priceUnit price per -
Vendor:truckparts4u.comA35812-20 Gearset | Genuine Meritor Rockwell AxleTech SQHD-Front R5.29 | New OE
A35812-20 Rockwell Meritor AxleTech Gearset | SQHD Front | 5.29 Ratio | New Product Summary:Part Number: A35812-20Brand: Rockwell...Regular price $1,074.47 USDSale price $1,074.47 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.