Product Description
Shimano 100JJ (19FX40) Drive Gear
Restore the smooth, powerful cranking performance of your Shimano spinning reel with the genuine Shimano 100JJ Drive Gear. As the heart of your reel's internal drivetrain, the drive gear is responsible for transferring power from the handle to the rotor. This high-precision component is engineered to provide a seamless mesh with the pinion gear, ensuring reliable torque and a fluid retrieval experience.
Constructed from durable, corrosion-resistant alloys, the 100JJ drive gear is built to handle the stresses of repeated casting and fighting stubborn fish. Whether you are replacing a worn gear that feels "crunchy" or performing a complete reel overhaul, this OEM part guarantees the exact tolerances required for Shimano's signature feel.
Product Features
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Genuine Shimano OEM Part: Guaranteed to match the original factory specifications for fit and performance.
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Precision-Cut Teeth: Optimized for quiet operation and efficient power transfer.
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Durable Construction: Designed for longevity in both freshwater and light saltwater applications.
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Direct Replacement: Fits seamlessly into the gear housing without modifications.
Compatibility & Fitment
The 100JJ drive gear (often associated with the 19FX40 series code) is a primary component for the following Shimano spinning reel models:
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Shimano FX Series: FX-4000FC
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Shimano Sienna Series: SN-4000FG
Technical Note: Part numbers and designs can vary by production year and region. To verify this is the correct drive gear for your specific reel, please refer to the exploded view diagrams at www.reelschematic.com.
Maintenance & Lubrication
To maximize the lifespan of your new drive gear and maintain a "whisper-quiet" retrieve, proper lubrication is essential during installation:
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Gear Teeth: Apply a thin, even layer of Deuthlon Reel Grease to the teeth of the drive gear. This high-performance grease stays on the gear faces under pressure, reducing wear and preventing metal-to-metal friction.
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Main Shaft & Bearings: Use a drop of Deuthlon Reel Oil on the drive gear shaft and associated bushings or bearings to ensure lightning-fast response and protection against moisture.
When to Replace Your Drive Gear
If your reel begins to feel "gear-bound," makes a rhythmic clicking noise during the retrieve, or feels rough under the pressure of a fish, the drive gear teeth may be worn or pitted. Replacing the drive gear along with the pinion gear is the most effective way to eliminate "gear feel" and return your reel to its original out-of-the-box smoothness.
