Toro 107-3709 Wheel Gear Assembly 8 Inch Mower Drive

Product Description

The TORO 107-3709 is an OEM-replacement wheel gear assembly designed for Toro walk-behind lawn mowers. This component transfers drive power from the transmission to the rear wheel, allowing the self-propel system to engage properly and move the mower forward. Constructed from polypropylene, the assembly is sized at 8 inches in diameter and provides the structural interface between the axle and the wheel hub. Licensed TORO technicians and experienced service professionals install this part during routine drivetrain maintenance or when a worn gear causes the self-propel function to slip or fail entirely.

This wheel gear assembly is suited for residential walk-behind mower applications where the self-propelled drive system relies on a gear-driven rear-wheel mechanism. It is a direct OEM-style replacement intended to restore factory drive performance. When the original gear wears, cracks, or strips its teeth, replacing it with a correctly specified assembly like the 107-3709 returns the mower to full operational condition. Consult the mower's model-specific parts diagram to confirm fitment before installation.

Key Features

• OEM-replacement part sourced directly from TORO
• Polypropylene construction resists wear under repeated drive-cycle loading
• 8-inch diameter matches the original wheel gear geometry
• Designed to restore self-propel function on compatible Toro walk-behind mowers
• Part of the axle, roller, shaft, and wheel assembly category for Toro lawn and garden equipment

Compatibility

Designed as an OEM-style replacement wheel gear assembly for compatible Toro self-propelled walk-behind lawn mowers. Verify fitment using the mower model number and the Toro parts diagram before ordering.

Installation Notes

A qualified small-engine or outdoor-power-equipment technician should perform this replacement. Disconnect the spark plug wire before beginning any disassembly to prevent accidental engine start. Remove the wheel and any retaining hardware before extracting the worn gear assembly, and inspect the axle shaft for wear before installing the new part. Reinstall all retaining clips and fasteners to the manufacturer-specified engagement to ensure the drive system operates safely.

Technical Specifications

• Diameter: 8 inches
• Material: Polypropylene
• Part Type: Wheel Gear Assembly

Standard Information

• Brand: TORO
• Manufacturer Part Number: 107-3709