Differential Parts
About Differential Parts
A differential splits power between the two wheels on an axle and lets them turn at different speeds in a corner. On a four-wheel-drive UTV or ATV, the front and rear differentials are sealed gear cases, and the seals and bearings in them are what leak and wear. Riders shop here when they see gear oil weeping from an axle seal or hear a whine from the gear case.
The listings are seal kits and bearing and seal kits, sold for the front or rear differential of a specific machine, including Honda, Yamaha, Can-Am, Polaris, Kawasaki and Suzuki models. Match the position and the model years. Some kits are seals only, and others add bearings, so read the title. These jobs mean draining the fluid and refilling to the level your manual specifies, and they go more smoothly with the right drivers to seat seals and bearings straight.
Brands in this category include EPI, All Balls, Moose Offroad and Venom Products. Related parts are in Bearings, Gaskets & Seals and CV Axle Assemblies, all part of Transmission & Drivetrain. Pick your machine in the Ride Finder at the top of the page to see kits made for it.
FAQs on UTV and ATV differential parts
How can I tell that a differential seal is leaking?
Look for oil around the axle where it enters the differential, on the inside face of the wheel or CV boot, or on the housing. A low fluid level on the check plug confirms it. Gear oil has a strong smell, which helps tell it from other fluids.
What fluid goes back in the differential after a seal job?
The type and amount in your owner's manual. Front and rear differentials can use different fluids, and some machines specify a particular front differential fluid. Do not overfill, and check for leaks after the first ride.
Is a front differential seal kit the same as a rear kit?
No. Kits are listed separately for the front or rear and for each model, because the housings and seal sizes differ. Match the position and model years in the listing, and compare the old seals with the new.
What does milky differential oil mean?
Milky or foamy oil means water has gotten into the differential, often past a worn seal or through a blocked breather. Change the fluid, replace the leaking seal, and check that the breather hose is clear. Water left in the case damages the bearings.
