Description
Product Overview
Part Name: Engine Flywheel
Part Number: 3974147
Vehicle Compatibility: Suitable for Cummins ISX12 and ISX15 engines installed in Freightliner Cascadia, Kenworth T680, Peterbilt 579, and similar North American Class-8 trucks manufactured between 2003–2024. Matches OEM driveline geometry for long-haul, heavy freight and regional carrier operations.
Configuration: Forged from high-strength alloy steel with a precision-cut ring gear for stable starter engagement. Balanced for optimal rotational inertia, smooth clutch contact and reduced vibration during continuous high-load cycles.
Function: Supports consistent torque delivery, stabilizes idle operation, enhances gear transition smoothness and reduces clutch wear. Restores power-transfer efficiency when the original flywheel shows heat cracking, tooth wear or surface fatigue.
Technical Specifications
Type: Heavy-duty Class-8 truck flywheel
Material: Forged alloy steel with hardened ring gear
Application: Fits ISX12/ISX15 engines using flywheel reference 3974147
Cross-Reference: Interchangeable with OEM Cummins flywheel dimensions
Installation: Replace when vibration, starter slip or clutch chatter occurs
Service Interval: Typically replaced every 500,000–700,000 km
Delivery & Availability
Stock Options: Available in ready stock
Delivery Time: 3–7 days internationally
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