Flywheel Ring Gear Cummins 3905427 | J905427, 3916161, 3974419, 75208365

High-Performance Flywheel Ring Gear for Cummins Engines

Restore the starting reliability of your heavy-duty diesel engine with this premium flywheel ring gear. Designed to meet or exceed industry standards, this ring gear features 127 precision-cut teeth to ensure seamless engagement with the starter motor pinion, preventing slippage and premature wear.

Key Features & Benefits

• Precise Fitment: Engineered to exact dimensions for a secure press-fit installation on the flywheel.
• Durable Construction: Manufactured from high-strength steel to withstand the high torque and heat generated during engine startup.
• Smooth Operation: 127-tooth configuration provides consistent, reliable starter engagement every time.

Technical Specifications

• Inside Diameter: 383.70 mm (15.08 in)
• Outside Diameter: 407.00 mm (16.02 in)
• Thickness: 15.80 mm (0.63 in)
• Tooth Count: 127

Compatible Engine Models

This flywheel ring gear is widely used across various Cummins engine families, including but not limited to:

• Cummins 4BT 3.9
• Cummins 6BT 5.9
• Cummins 6CT 8.3
• Cummins QSB 4.5, QSB 5.9, QSB 6.7
• Cummins ISB 6.7