Input Shaft Bearing

The input shaft bearing for BERT Transmissions Second Generation is a precision ball bearing engineered to support the primary rotating load inside high-performance manual and automatic transmission assemblies. This component is essential for drag racing, street rod, and performance automotive builds where transmission reliability and minimal rotational friction directly impact acceleration and power delivery. The bearing absorbs radial and thrust loads while maintaining tight tolerances—critical for transmissions operating at elevated RPM and torque levels.

Manufactured to OEM specifications, this input shaft bearing features a 1.375-inch inner diameter and 2.830-inch outer diameter, designed specifically for BERT Second Generation transmission platforms. The ball bearing construction provides smooth, low-friction operation under sustained load, reducing parasitic drag on the engine and improving overall drivetrain efficiency. Precision-grade steel races and hardened bearing balls ensure long service life even in competition environments where thermal cycling and extreme load reversals are common. The compact 3.7 x 1 x 4.05-inch envelope integrates seamlessly into transmission bell housings without modification.

This input shaft bearing is indispensable for technicians and builders servicing BERT transmissions in muscle cars, drag vehicles, and high-horsepower street applications. Installation requires proper transmission disassembly and bearing insertion into the input shaft assembly; many builders pair this bearing with fresh seals and fluid to maximize longevity. Verify fitment against your specific BERT Second Generation transmission model before ordering, as bearing seat dimensions are critical to proper alignment and load distribution during operation.