3978313 | Genuine Cummins® Flywheel Ring Gear

SKU: 3978313 MPN: 3978313

Reliable engine start engagement is supported by the Genuine Cummins Flywheel Ring Gear under Part Number: 3978313, delivered new for B-Series engines, featuring 159 teeth, 10/12 pitch and rated up to 2920 RPM.

$299.00
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: 3978313

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Product Description

Product Name Flywheel Ring Gear Product Name Flywheel Ring Gear
Condition New Condition New
Brand Cummins® Brand Cummins®
Part Number 3978313 Part Number 3978313
Engine Compatibility
Cummins B-Series Cummins B-Series
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:

The Flywheel Ring Gear from Genuine Cummins is available in new condition with Part Number: 3978313. It is designed to provide precise engagement between the starter motor and flywheel, enabling reliable engine cranking and smooth initial rotation. This component is used with Cummins B-Series applications and plays a key role in consistent engine starting performance.

Why Replacement is Important:

Over time, ring gear teeth can wear, chip, or misalign due to repeated starter engagement, leading to hard starting or grinding noise during ignition.

Impact on Vehicle Performance:

A new ring gear ensures accurate starter engagement, improves starting reliability, and helps maintain smooth engine activation without excessive mechanical stress.

Manufacturer Information:

Cummins® develops durable engine components engineered for precision, long service life, and dependable performance in heavy-duty diesel applications.

Tags & Category: Ring Gear, Flywheel Gear, Starter Ring Gear, Flywheel Ring, Engine Ring Gear, Cummins Ring Gear, Starter Gear, Flywheel Component, Engine Gear, Truck Ring Gear

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: 3978313