Countershaft Bearing for Manual Gearbox ⚙️

Why this part is needed

This precision bearing supports the counter gear set inside the manual transmission. It keeps gears in perfect mesh, controls endplay, and reduces friction. With a healthy countershaft bearing, shifting stays smooth, gear noise stays low, and torque is transferred efficiently .

How it works

Hardened rollers run between inner and outer races, carrying high radial loads from the gear train. Bath-lubricated by gear oil, it maintains tight clearance so the countershaft runs true. A correct press-fit in the case and proper preload keep the gearbox quiet and cool during long service.

What happens if it’s broken

Wear or pitting causes a rising whine in most gears, metal flakes in oil, vibration under load, hard shifting, or gear jump-out. Left unchecked, misalignment chews gear teeth and synchros, overheats oil, and can seize the transmission. Replace the bearing and inspect the shaft, gears, and shims for best results .

Tech notes

Press in squarely, verify endplay/backlash, renew seals and case gasket, and refill with the correct GL-4 spec oil. Final road test to confirm quiet run and clean engagement.

Compatibility

• Frontier
• Np300
• Pathfinder
• Truck-Hardbody
• Terrano2
• Truck
• Stagea
• Firelady Z
• Skyline
• King Cab
• Datsun Truck
• Safari
• Patrol
• Hardbody
• Navara
• 300Zx
• Np300 F/Sbs,Med
• Truck Eg
• Cedric/Gloria
• Xterra
• Pickup
• Terrano
• Desert Thunder
• Nissan Truck Zn