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!
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.
Doing a gear ratio change but not sure what you what’s best? Try our Calculator!
From Gear Ratio Calculators to complete Installation Instructions. You’ve found the place!
Dealer / Installers
Years in Business
Featured Products, News & Specials
Sierra Gear Apparel
Lots of colors and sizes still available. High-Quality 100% cotton pre-shrunk material. We have Tees, Hoodies and Crew Neck Sweatshirts in Black, Blue, Olive Drab and Tan
Careful identification of the differential you are working on will make sure you get the right parts for the job the first time. Need help with your differential identification …
Differential Gear Calculators
Our Differential Gear Ratio Calculator can help you select the correct gear ratio to maximize the performance of your vehicle. The addition of larger tires can greatly …
Keep up with Sierra Gear & Axle with our Event Coverage and Trip Reports. Sometimes we get to go out and play too!
JK Axle Shafts
Factory JK axle shafts are fine for small tires and mild use. The addition of big tires, lower gears and plans to run the tougher trails begs for the added strength of chromoly
Guaranteed Quality Gear & Axle Parts Since 1992!
“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.”
“Sierra Gear and their crew have kept me in the gear business since 1999. Great parts at great prices!”
“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!!!”