8TEN Transmission for Toro TimeMaster 30in Walk-Behind Mower — Direct-Fit Replacement with Pulley & Mounting Hardware

If your Toro TimeMaster 30-inch walk-behind mower (serials 312000001–999999999, model years roughly 2012–2017) has a worn or damaged transaxle, the 8TEN transmission is engineered as a direct-fit replacement to restore drive performance. This unit ships with the pulley and mounting hardware you need, uses durable materials for case, shafts and gears, and matches the original connection types for input and output shafts to simplify installation.

How does this transmission match my Toro mower?

The 8TEN transaxle is built specifically to pair with Toro OEM numbers 131-9665, 127-0656, and 120-5211 and is intended for TimeMaster 30in walk-behind mowers produced in the stated serial range. Fit and connection points mirror the factory item so you won’t need extensive modifications.

• Compatible OEM references: Toro 131-9665, 127-0656, 120-5211
• Designed for Toro TimeMaster 30in BBC walk-behind mowers (SN: 312000001–999999999)
• Input shaft: bolted connection; output shaft: retainer circlip
• Includes mounting hardware to streamline swap-in

What are the mechanical and material specifications?

This replacement uses materials selected for strength and longevity in outdoor power equipment. The case, shafts and gears are made from industry-grade alloys and polymers to resist wear while maintaining original geometry for reliable power transfer.

• Case body: ASTM A383 for structural durability
• Shafts: SAE 1055 steel for robust torsional strength
• Gears: ASTM B783 for consistent wear characteristics
• Pulley: ASTM D4066, outer diameter 3.54 in, inner diameter 2.81 in, height 0.59 in

What comes in the box and how easy is installation?

The assembly arrives complete with the pulley and the mounting hardware required for a typical replacement. Because input and output attachment styles match the original (bolted input, circlip output), installation is straightforward for anyone comfortable with basic mower maintenance.

• Pulley pre-installed with specified diameters and height
• All necessary mounting bolts and fasteners included
• No special machine tools generally required beyond common hand tools
• Follow Toro’s service manual torque and alignment guidance for best results

Will this transmission improve mower reliability?

Replacing a failing transaxle with a properly matched unit restores drive functionality and reduces slippage, vibration, and abnormal noises associated with worn gears or shafts. While it doesn’t change engine power, it returns the drive train to factory-spec performance when installed correctly.

• Re-establishes correct gear engagement and shaft alignment
• Reduces drivetrain play that causes inefficiency or noise
• Durable materials intended for repeated mowing seasons

Who is this for: This 8TEN transmission is for Toro owners and independent repair shops needing a like-for-like replacement for the TimeMaster 30-inch walk-behind mower transaxle. It’s aimed at anyone who wants a direct-fit unit manufactured with durable materials and shipped with pulley and mounting hardware to minimize downtime during repair.