3973522 | Genuine Cummins® Engine Flywheel Assembly

SKU: 3973522 MPN: 3973522

The Engine Flywheel Assembly by Genuine Cummins is delivered new and carries Part Number: 3973522. Designed for Cummins ISB, ISD, ISF, ISG, B-Series 4.5L/6.7L and QSB diesel engines.

$1,599.00
No Core Charge
8 in stock, ready to ship

Pickup available at Warehouse - Howard st 7092 ste F

Usually ready in 24 hours

Need it fast? We offer overnight shipping

Contact us to check if overnight next-day delivery is available for your order - PN: 3973522

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    Pickup available. Usually ready in 24 hours

Product Description

Product Name Engine Flywheel Assembly Product Name Engine Flywheel Assembly
Condition New Condition New
Brand Cummins® Brand Cummins®
Part Number 3973522 Part Number 3973522
Cross Reference 3973521 Cross Reference 3973521
Engine Compatibility
Cummins ISB / ISD / ISF / ISG Cummins ISB / ISD / ISF / ISG
Cummins B-Series (4.5L/6.7L) Cummins B-Series (4.5L/6.7L)
Cummins QSB Cummins QSB
Specifications
Maximum RPM 2920 Maximum RPM 2920
Ring Gear Pitch 10/12 Ring Gear Pitch 10/12
Ring Gear Tooth Count 159 Ring Gear Tooth Count 159

Useful Information

Description and Purpose:

Supporting stable engine rotation and reliable starter engagement, the Engine Flywheel Assembly manufactured by Genuine Cummins with Part Number: 3973522 is provided new. It functions as a key rotational mass that smooths engine pulses and ensures consistent interaction between the crankshaft and transmission system. This assembly is compatible with Cummins ISB/ISD/ISF/ISG/B-Series/QSB applications. Cross Reference: 3973521.

Why Replacement is Important:

Over time, heat stress and repeated engine starts can cause wear on the ring gear or flywheel surface, leading to inconsistent starting behavior or mechanical noise.

Impact on Vehicle Performance:

A properly functioning flywheel ensures smoother engine operation, improved starter engagement, and reduced drivetrain vibration during load changes.

Manufacturer Information:

Cummins® produces precision-engineered diesel engine components designed for durability, stability, and long-term reliability in commercial and industrial applications.

Tags & Category: Flywheel, Engine Flywheel, Flywheel Assembly, Cummins Flywheel, Diesel Flywheel, Truck Flywheel, Flywheel Plate, Engine Rotor, Crankshaft Flywheel, Heavy Duty Flywheel

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 3973522