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.