Front Differential Bearing And Seal Kit For Polaris Ranger 800 6x6 2015-16 And Sportsman 400 HO 2013 570 EFI 2014-16

This front differential bearing and seal kit is the complete rebuild solution you need for Polaris Sportsman and Ranger front differentials. It’s designed to fit the listed models and years, delivering fresh bearings and new seals to restore smooth operation, reduce play, and stop leaks that can ruin drivetrain performance on trails or the farm. When you replace the worn components, you’ll notice quieter operation, improved preload consistency, and renewed confidence in hard-duty use. This aftermarket kit targets front-diff wear and seal failures that commonly chew up gears and leak oil after heavy use. By supplying fresh bearings and double-lip seals, it helps maintain proper gear alignment and fluid retention, making it a reliable choice for rugged off-road work and long days in rough terrain.

Comprehensive Vehicle Fitment

Manufacturer	Models / Series	Years / Details
Polaris	Ranger 800 6x6	2015-2016
Polaris	Sportsman 400 HO 4x4	2013
Polaris	Sportsman 450 HO	2016
Polaris	Sportsman 500 HO 4x4	2013
Polaris	Sportsman 570 EFI	2014–2016
Polaris	Sportsman 570 EFI/EPS	2014–2015
Polaris	Sportsman 570 EFI HD	2014
Polaris	Sportsman 570 EFI UTE HD	2015–2016

Product Specifications

Attribute	Details
OEM Reference Part Numbers	3234390; 3234406
Type	Front Differential Bearing & Seal Kit
Manufacturer	Aftermarket Replacement
Application	Polaris Sportsman / Ranger front differential
Included Bearings	3 bearings
Included Seals	3 oil seals
Included O-Rings	2 square O-rings
Material Notes	Bearings and seals engineered for off-road dirt and vibration; seals designed for aggressive water and mud exposure

OEM & Aftermarket Cross-Reference Information

Part Number	Brand / Type	Cross-Reference Notes
3234390	Polaris OEM	Front differential bearing & seal kit; used on several Sportman/Ranger front diffs
3234406	Polaris OEM	Front differential bearing & seal kit; common replacement reference
25-2065	All Balls Racing	Front differential bearing & seal kit; compatible with Ranger 500 Crew (Midsize), Ranger 800 Crew, Ranger XP 800, among others
DK309.01	East Lake Axle	Polaris Ranger/Sportsman/Scrambler front differential bearing & seal kit; upgraded Sprague cage in some versions
1205-0269	Moose Offroad	Front differential bearing & seal kit; fits 2015-2016 Ranger and 2013-2026 Sportsman ATVs/UTVs

What's Included

This kit includes the exact components required to rebuild the front differential bearings and seals for listed Polaris models.

• 3 x Bearings
• 3 x Oil Seals
• 2 x Square O-Rings

Does not include the differential cover gasket or gear oil. If you need additional seals or bearings, please request the complete service kit.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Precisely engineered to match the front differential requirements of Polaris Sportsman and Ranger models listed above.
• OEM Cross-Reference Ready: Aligns with common OEM numbers and well-known aftermarket equivalents for straightforward sourcing.
• Premium Materials for Off-Road Life: Built to resist dirt, mud, heat, and vibration typical of trail and farm use.
• Performance Restoration: Rebuilds front-end preload and lash to restore quiet, confident operation after wear.
• Cost-Effective Reliability: A durable replacement option that keeps downtime lower than sourcing an OEM kit.
• Trail- and Farm-Ready: Designed to withstand demanding conditions you’ll encounter away from paved surfaces.

Installation Notes:

• Drain the front differential oil and clean all mating surfaces before disassembly.
• Remove the differential cover and inspect the carrier for wear; replace worn components with the kit parts in the correct orientation.
• When installing bearings, use a proper bearing driver or press to avoid brinelling; ensure the race seats fully against the bore.
• Install oil seals with clean, dry surfaces and a light film of gear oil on the seal lips to prevent rotation damage during seating.
• Reassemble with new O-rings in place; ensure seals and gaskets are seated evenly to prevent leaks.
• Refill with the recommended gear oil and verify the front differential operates smoothly before road testing; torque fasteners to the service manual specification.

Why Upgrade?

A worn front differential bearing or leaking seal can lead to gear lash, increased heat, reduced lubrication, and ultimately drivetrain failure in demanding trail or farm conditions. Replacing with this kit reinstates proper preload and oil retention, restoring reliability and peace of mind when you’re miles from help.