Differential Bearing And Seal Kit For Polaris Rear Fits Sportsman 570 2015 2016 Models

This Rear Differential Bearing and Seal Kit for Polaris is the essential aftermarket service solution you need to refresh the Sportsman’s rear drivetrain. Designed to service Polaris Sportsman 570 family models, including EFI EPS and Touring variants, it replaces worn bearings and seals that are prone to leaks, excessive play, and gear noise after years of trail-duty or farm work. Rebuilding the rear differential with this kit helps restore quiet operation, maintain proper gear lash, and protect the final drive from contamination on muddy trails or wet jobs.

Engineered for real-world use, this aftermarket replacement delivers reliable durability and straightforward installation for riders who rely on their Sportsman in demanding environments. It aligns with proven Polaris rear-diff service configurations and uses quality bearings and seals designed to withstand mud, water, and heavy-duty use on trails or land-management tasks, making it a trusted choice when time and cost matter for maintenance on the farm or in the woods.

Comprehensive Vehicle Fitment

Fitment notes drawn from aftermarket service-kit references commonly used for Polaris Sportsman rear differentials, including DK317.01 configurations and related cross-reference listings. These sources confirm broad compatibility with the 570 family and related Sportsman models.

Product Specifications

OEM references are represented by Polaris part numbers commonly listed for these rear-diff kits, while the aftermarket cross-reference options include popular aftermarket catalog numbers such as All Balls 25-2087 series. Bearing and seal materials reflect typical high-durability components used in these kits, with ABEC-3 precision for the bearings and nitrile seals designed for wet environments.

OEM & Aftermarket Cross-Reference Information

OEM numbers are corroborated by Polaris OEM references; aftermarket cross-references include All Balls 25-2087 variants and DK317.01 configurations from East Lake Axle, which are commonly used as compatibility checks for the same Sportsman rear-diff application.

What’s Included

This kit provides the essential bearings and seals required to service the Polaris Sportsman rear differential. In many configurations, it also includes a pinion repair sleeve to facilitate a complete, one-box repair during a single teardown.

• Rear differential bearings
• Seals
• Pinion repair sleeve (included in some configurations)

Related parts such as differential oil, cover gaskets, and mounting hardware are not included unless specified in a particular kit variant.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility — engineered to match Polaris Sportsman rear-diff layouts for the 570 family and related models.
• OEM Cross-Reference — aligns with Polaris OEM references and widely-used aftermarket cross-references for accurate replacement fitment.
• Premium Materials — chrome steel bearings paired with nitrile seals deliver reliable performance in wet, muddy, and dusty conditions.
• Performance Restoration — restores proper bearing preload and sealing integrity to prevent leaks and excessive driveline play.
• Value for Money — a complete service kit that minimizes downtime and extends rear-diff life compared with piecemeal purchases.
• Trail- and Farm-Ready Durability — designed to withstand frequent exposure to mud, water, and rugged terrains common to off-road use.

Installation Notes:

• Drain the rear differential oil and remove the rear differential cover to access the bearings and seals.
• Inspect the gear mesh backlash and wear patterns before installing new bearings; replace any worn gears if necessary.
• Clean mating surfaces thoroughly; score-free surfaces reduce seal leaks and extend seal life.
• Press or install bearings squarely using appropriate tools to avoid race damage or bearing misalignment.
• Lubricate seals lightly with clean differential oil before seating; ensure seals are fully seated to prevent leaks.
• Reassemble with fresh gasket or RTV sealant per your model’s service manual, refill with the correct Polaris-recommended diff oil and check for leaks after a short test ride.

Why Upgrade?

Running a worn rear-diff bearing or compromised seals on a Polaris Sportsman can lead to progressive leaks, loss of lubrication, and accelerated gear wear. Replacing with this aftermarket kit restores proper seals and bearing preload, significantly reducing the risk of differential failure and keeping your ATV dependable on tough trails or farm work.