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Quality Differential Parts You Can Trust
At Western Drivetrain, we don't just repair differentials—we also supply high-quality differential parts for professional technicians, repair shops, and do-it-yourself customers. Whether you're rebuilding a stock rear end, upgrading for better performance, or replacing worn components, we carry dependable parts from some of the most respected manufacturers in the drivetrain industry.
We proudly offer premium brands including Yukon Gear & Axle, Motive Gear, USA Standard Gear, Nitro Gear & Axle, Spicer, Dana, AAM (American Axle & Manufacturing), Timken, National, Koyo, SKF, and Richmond Gear. These trusted manufacturers are known for producing durable ring and pinion gear sets, bearings, seals, lockers, limited-slip differentials, axle shafts, and complete differential rebuild kits.
Our knowledgeable staff can help you choose the right parts for your vehicle, whether it's a daily driver, work truck, classic car, off-road vehicle, or high-performance build. We understand that using quality parts is the key to a reliable, long-lasting repair, which is why we only recommend products we trust and use ourselves.
If you're not sure exactly what you need, we're here to help. With decades of drivetrain experience, we'll make sure you get the correct parts the first time—saving you time, money, and frustration.
Quality parts. Expert advice. Competitive pricing. That's the Western Drivetrain difference.
An axle shaft is one of the most important components of your vehicle's drivetrain. Its job is to transfer power from the differential to the wheels, allowing your vehicle to move. Whether you drive a rear-wheel drive, four-wheel drive, or all-wheel drive vehicle, your axle shafts are designed to handle the engine's torque while supporting the demands of acceleration, towing, off-road driving, and everyday use.
A ring and pinion installation kit contains all the essential components needed to properly install and set up new differential gears. Using high-quality replacement parts during installation helps ensure proper gear alignment, smooth operation, and long service life.
A posi carrier (also called a limited-slip differential carrier, Positraction, or LSD) is designed to send power to both drive wheels when one tire starts to lose traction. Unlike an open differential, which sends most of the power to the wheel with the least resistance, a posi carrier helps keep both wheels driving the vehicle.
A ring and pinion is the heart of your vehicle's differential. It's a matched set of gears that transfers power from the driveshaft to the axle shafts while changing the direction of power flow by 90 degrees.
Standard (Open) Carrier
A standard carrier (also called an open differential carrier) is the main housing inside a differential that holds the spider gears and side gears. Its job is to transfer power from the ring gear to the axle shafts while allowing the left and right wheels to rotate at different speeds.