Performance. Precision. Proven.
Sierra Gear & Axle

Guaranteed Quality Parts!

Since 1998, Differential Repair Professionals and DIY Installers have relied on Sierra Gear & Axle for Guaranteed Quality Differential and Axle components. Sierra Gear & Axle is the OEM quality alternative to high priced OEM parts.

Trusted by the Pros since 1998!

Product Categories

Sierra Gear & Axle Ring & Pinion Gears

Ring & Pinion Gear Sets

Sierra Gear & Axle has a complete inventory of Ring and Pinion Gear Sets.

Sierra Gear & Axle Differential Install Kits

Differential Installation Kits

Sierra Gear & Axle Kits are the most complete in the industry!

Sierra Gear & Axle OEM Quality Replacement Axle Shafts

Replacement Axle Shafts

Sierra Gear & Axle has a complete line of Front & Rear Axle Shafts.

Sierra Gear & Axle Chromoly Performance Axle Shafts

Performance Axle Shafts

Chromoly Performance Axle Shafts from Sierra Gear & Axle.

Work or Play, On Road or Off…We’ve Got you Covered!


Find a Dealer / Installer

Use our dealer locator to find the nearest dealer or installer.

Gear Calculator

Doing a gear ratio change but not sure what you what’s best? Try our Calculator!

Technical Info

From Gear Ratio Calculators to complete Installation Instructions. You’ve found the place!


Dealer / Installers

Years in Business

Featured Products, News & Specials

Guaranteed Quality Gear & Axle Parts Since 1992!

Happy Customers

“The Sierra brand gear is by far some of the nicest and easiest to set up aftermarket gears available. They have superb product knowledge and fantastic customer service.”

Ray H.

“Sierra Gear and their crew have kept me in the gear business since 1999. Great parts at great prices!”

John M.

“Don’t go anywhere else!  All the guys were very polite and professional, and the technical support I got over the phone was awesome. Great communication…The owner should be very proud. Great work Sierra!!!”

Eric W.