Mechanix Wear BU22 Flywheel Clutch Pilot Bushing

The Mechanix Wear BU22 is a flywheel clutch pilot bushing designed to support and center the transmission input shaft within the crankshaft or flywheel bore of manual transmission-equipped vehicles. This small but critical drivetrain component ensures proper alignment between the engine and transmission, allowing smooth clutch engagement and disengagement.

Key Features:

• Inner Diameter (ID): Approximately 0.630"
• Outer Diameter (OD): Approximately 0.814"
• Width: Approximately 0.685"
• Cross-references AMS BU22, APRA B201, 14011X, 4110015, and ACP PB-22-5
• Replacement pilot bushing for manual transmission applications
• Supports and centers the clutch disc and transmission input shaft during clutch disengagement

The pilot bushing plays a vital role in every clutch system — it allows the transmission input shaft to freewheel independently from the crankshaft when the clutch pedal is depressed, preventing wear and drivetrain noise. Replacing a worn or damaged pilot bushing during a clutch service job is considered best practice to ensure long-term reliability.