Niche Industries Rear Differential Assembly, fits 2002-2008 Yamaha Grizzly 660

Did your rear dif get swamped? Is your dif grinding or making weird noises? did it seize all-together? whatever the cause of failure, we'll get you back up and running with our Grizzly 660 rear differential assembly. Fully assembled this diff includes ring and pinion gears, bearings, seals, spacers cases as well as a new hardened shaft coupler to pair your rear dif with your rear shaft from the engine.

All Difs are not equal! A differential is only as good as the components its built with. Niche difs using premium quality seals and bearings; gears and couplers are made of forged steel and heat-treated for proper surface hardening to ensure long-lasting hassle free performance in mud, dirt, snow or sand.

Why should i buy new? can't i rebuild it just as good? New difs are built according to a replicated process, meaning every nut, bolt seal, gasket and gear is installed in accordance with factory specifications and done the same every time. Whenever you attempt to re-build any assembly with so many internal components your taking a risk and are more then likely to make an error or two. Buying new removes the risk of making those errors which can lead to being stranded in the middle of know-where.

Pro Tip: Ensure you top up with an approved differential fluid as recommended in your Yamaha user manual before riding for the first time with you new dif.

• Ring and pinion gears made of heat-treated 4340 steel
• All internal parts are fully compatible with the original Yamaha replacement parts
• Fully assembled including hardened shaft coupler
• Designed to outlast your stock differential
• Fits all Yamaha Grizzly models from 2002-2008