Moose Racing A25‑2033 Rear Differential Bearing & Seal Kit for Yamaha Big Bear / Grizzly / Kodiak / Wolverine / Bruin / Bear Tracker

OVERVIEW

This Moose Racing rear differential bearing and seal kit restores smooth rotational operation and seals out harmful contaminants from worn drivetrain housings. Constructed with high-speed EMQ bearings and type-TC rubber seals, the assembly delivers dependable power transfer and long-lasting wear resistance. Designed exclusively for Yamaha Big Bear, Grizzly, Kodiak, Wolverine, Bruin, and Bear Tracker models, it provides a focused upgrade path for aging transmissions.

ENGINEERING & PERFORMANCE

The sealed bearing arrangement minimizes rotational friction and vibration while maintaining consistent torque delivery under heavy mechanical load. Type-TC rubber compounds paired with garter-spring inner lips create a resilient barrier against mud, water, and particulate ingress that typically accelerates gear degradation. Rubber-covered outer diameters further enhance compression resistance and prolong seal integrity during extended trail use. As a factory-matching replacement set, the kit aligns perfectly with stock differential housings for straightforward installation and immediate driveline stability.

KEY FEATURES

• High-speed EMQ-quality bearings for low-friction rotation
• Type-TC rubber seals with integrated garter-spring inner lips
• Rubber-covered outer diameter design for superior seal retention
• Complete kit containing all necessary bearings and seals for full rear differential overhaul
• Direct OEM-style replacement geometry for precise mating
• Multi-model compatibility spanning multiple Yamaha ATV generations

TECHNICAL SPECIFICATIONS

• Brand: Moose Racing
• Part Name: A25-2033 Rear Differential Bearing & Seal Kit
• Component Type: Bearing & Seal Kit
• Material: EMQ-quality steel bearings, type-TC rubber seals
• Supported Years: 1993–2014
• Compatible Trims: Big Bear 2x4/4x4, Grizzly 4x2/4x4, Kodiak 4x2/4x4, Wolverine 4x2/4x4, Bruin 4x2/4x4, Bear Tracker

FITMENT

• Yamaha Big Bear 2x4 (1996–1999)
• Yamaha Big Bear 4x4 (2000–2006)
• Yamaha Big Bear 200 (2007–2009)
• Yamaha Bruin 4x2 (2004–2006)
• Yamaha Bruin 4x4 Auto (2004–2006)
• Yamaha Bruin 200 (2005–2006)
• Yamaha Grizzly 4x2 (2000–2004)
• Yamaha Grizzly 4x4 (1993–2014)
• Yamaha Grizzly 4x4 Auto (2007–2014)
• Yamaha Grizzly 600 4x4 (1998–2001)
• Yamaha Kodiak 4x4 (1993–2004)
• Yamaha Kodiak 4x2 (2000–2004)
• Yamaha Kodiak 450 (2003–2004)
• Yamaha Bear Tracker (1999–2004)
• Yamaha Wolverine 4x4 (1995–2010)
• Yamaha Wolverine 4x2 (2006–2009)

WHY RIDERS CHOOSE THIS

Riders rely on this bearing and seal pack to restore predictable driveline engagement and block abrasive trail debris from damaging internal components. The combination of precision-fitted EMQ bearings and reinforced TC rubber seals maintains tight clearances and suppresses heat buildup during sustained four-wheel drive operation. Because the hardware matches original housing dimensions, rebuilds require minimal adjustment and eliminate end-play that typically accelerates gear wear. Upgrading with this complete kit keeps Yamaha utility ATVs tracking straight, shifting torque efficiently, and staying in the field longer between overhauls.