8-97253097-2 BEARING; TOP GEAR SHAFT for ISUZU NQR70/4HK1-1

Engineered to Isuzu Transmission Specifications

The top gear shaft bearing provides essential radial and axial support for the shaft carrying the highest reduction gear, ensuring stable rotation and precise gear alignment under load. Isuzu Genuine Top Gear Shaft Bearings are manufactured to exact OEM dimensional tolerances—including bore diameter, outer diameter, width, and internal clearance—matching the specific bearing type (ball, roller, or tapered) and fit required for your transmission. This precision guarantees proper shaft positioning, correct gear mesh, and smooth power transfer. Aftermarket bearings often exhibit inconsistent internal clearances or incorrect raceway geometry, leading to shaft misalignment, gear noise, and premature bearing failure.

Built for High-Speed Operation & Torque Loads

Top gear shaft bearings endure high rotational speeds, significant radial loads, and thrust forces generated during acceleration and deceleration. Isuzu Genuine Bearings feature premium-grade bearing steel with precision-ground raceways, heat-treated rolling elements, and optimized internal geometry for maximum load capacity and fatigue resistance. High-quality cages—whether steel, brass, or polymer—maintain proper rolling element spacing and reduce friction. Sealed or shielded variants incorporate advanced contamination protection to retain lubrication and exclude debris. This robust construction ensures consistent performance, minimal vibration, and extended service life under demanding operating conditions.

Restore Shaft Stability with Genuine Assurance

A worn or non-genuine top gear shaft bearing can lead to excessive shaft runout, gear misalignment, increased noise, and eventual damage to gears, synchronizers, and housing bores. Using an incorrect bearing may also void your Isuzu driveline warranty. By choosing an Isuzu Genuine Top Gear Shaft Bearing, you restore factory-specified shaft support, maintain transmission precision, and ensure the long-term reliability your vehicle was designed to deliver. Always specify genuine for internal transmission repairs.