The Worm Gear – TCU40491 is a genuine John Deere drivetrain component designed to transmit rotational motion and torque within compatible reel cutting unit gearcases. Worm gears are essential components in right-angle gear sets where they mesh with a worm wheel (worm wheel/gear) to reduce speed and increase torque in compact, quiet drives. This part is manufactured to John Deere OEM standards to ensure correct gear tooth engagement, reliable performance, and long service life in turf-care and mower applications.

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Key Features

• Genuine John Deere OEM Part – Built to original equipment specifications for dependable fit and performance.

• Precision Machined Gear – Provides accurate tooth profile for smooth, efficient power transmission.

• Durable Construction – Designed to withstand load, torque, and mowing duty stresses.

• Critical Drivetrain Component – Essential for proper operation of worm drive systems in cutting units.

• Direct Replacement Fit – Installs easily in compatible reel cutting unit assemblies.

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Fits These John Deere Models

This worm gear (TCU40491) is commonly used in a variety of John Deere turf and mowing machines with worm drive reel cutting units, including models such as:

• 180E / 180SL

• 220 / 220SL

• 2400 PrecisionCut

• 2500B / 2500E / 2550E-Cut Hybrid

• 2653B

• 2700 PrecisionCut / E-Cut Hybrid

• 2750 PrecisionCut / E-Cut Hybrid

• 6080A E-Cut

• 6500A E-Cut

• 7200 / 7200A

• 7500 / 7500A E-Cut

• 7700

• 8000 / 8000A E-Cut

• 8500 / 8700 / 8900A

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Technical Specifications

• Part Number: TCU40491

• Component Type: Worm gear

• Brand: John Deere

• Application: Right-angle drive within reel cutting unit gear sets

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Typical Applications

This worm gear is typically used to:

• Transmit rotational motion in right-angle gearbox drives

• Reduce input speed and increase torque for reel cutting assemblies

• Mesh with worms and worm wheels in turf-care reel mowers

• Serve as part of traction or reel drive mechanisms in turf maintenance equipment

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Why Choose Genuine John Deere Worm Gears

Using genuine John Deere components such as the Worm Gear – TCU40491 ensures correct tooth profile, precision fit, and consistent mesh with mating gears. Properly matched drivetrain parts help reduce noise, improve torque transfer, and extend the service life of your mower’s cutting or drive system — key to reliable and professional turf maintenance.