MTD Snowblower Gearbox Assembly 918-04170C

Basic information

• Part name: Snowblower gearbox assembly
• Manufacturer: MTD
• Category: Snowblower drivetrain and gearbox components
• Primary function: Houses and supports the gears and shafts that transfer power from the engine to the auger and drive systems

Installation & compatibility

• Compatible models: Fits select MTD and Craftsman snowblowers; confirm compatibility using your models parts diagrams
• Installation difficulty: Hard; requires removing the old gearbox and installing the new assembly in the correct orientation
• Tools required: Wrench set, socket set, pliers, possibly a bearing puller

Additional information

This snowblower gearbox assembly, part number 918-04170C, contains the internal gears, shafts, and bearings that transfer rotational power from the engine through speed and direction changes to the auger and wheels. It supports controlled movement and helps maintain proper alignment between drivetrain components during operation.

If internal gears, shafts, or bearings wear, become damaged, or lose lubrication, the gearbox may operate roughly or inconsistently. You might notice unusual noises, vibration, reduced performance, or difficulty engaging the auger or drive systems if the gearbox assembly is compromised.

Disconnect the spark plug wire before starting the repair to prevent accidental startup. Gearbox assemblies and surrounding frame areas can have sharp edges, so wearing work gloves can help protect your hands during installation. Make sure the gearbox is aligned correctly and all fasteners are tightened securely before using the snowblower.

Snowblower gearbox assembly 918-04170C replaces part numbers 618-04190B, 618-04170C, 918-04190B, 918-04190, 918-04170B, 918-04170A, 618-04170B, and 918-04190A.