A4030320305
Ring Gear
Detroit Diesel

The ring gear serves as a fundamental component in engine starting systems, engaging with the starter motor to turn the flywheel and initiate engine rotation. With an inner diameter of 432 mm and an outer diameter of approximately 485.46 mm, this steel gear features 160 precisely machined teeth that ensure smooth engagement and reliable power transfer. Its 18.50 mm height contributes to proper meshing with the starter gear, while the durable steel material withstands repetitive stress, thermal expansion, and corrosion. Properly maintained ring gears are essential for quick engine starts and overall reliability of the drivetrain. These components are often custom-fitted to specific engine models, and sourcing high-quality parts is crucial for long-term performance. Source One Parts Center provides genuine ring gears, supporting dependable engine starting in heavy-duty diesel applications.