8TEN Transmission for Toro Recycler 22 Rear-Bagger (2009–2016) — Direct-Fit with Pulley & Mounting Hardware, Durable Gears

8TEN's direct-fit transmission replaces Toro OEM 121-9178 and 115-4652 for the Toro Recycler 22 rear-bagger walk-behind mower models (SN range 290000001–999999999, 2009–2016).

This heavy-duty replacement transmission is built to restore drive performance for compatible Toro Recycler 22 rear-bagger and BBC walk-behind mowers from 2009–2016. It ships with the pulley and mounting hardware you need, uses durable engineering plastics and steels for gears and shafts, and matches the original specifications so installation is straightforward for experienced home mechanics or service pros.

Will this transmission fit my Toro mower?

Yes—this unit is designed to be compatible where Toro listed OEM part numbers 121-9178 or 115-4652. It fits the Toro Recycler 22 rear-bagger and Recycler 22 rear-bagger BBC walk-behind models within the serial number range shown.

• Compatible OEM numbers: Toro 121-9178, 115-4652
• Fits Toro Recycler 22 Rear Bagger (SN 290000001–999999999) 2009–2016
• Fits Toro Recycler 22 Rear Bagger BBC (SN 290000001–999999999) 2009–2016
• Check your mower serial number and original part label before ordering

What are the key mechanical specifications I should know?

The 8TEN unit includes a matched pulley and uses a threaded input connection and a retainer circlip output, mirroring the original drivetrain interfaces for easy swap-in. Materials were selected for durability under load while keeping noise and wear low.

• Pulley outer diameter: 2.288 in; inner diameter: 1.09 in; height: 0.57 in
• Input shaft: thread-type connection; output shaft: retainer circlip
• Case material: ASTM D4066 engineering polymer for impact resistance
• Shaft: SAE 1055 steel; gears: PA6 (nylon) for quiet operation

Does this transmission come ready to install?

The transmission arrives with the pulley and the necessary mounting hardware to replace the original assembly, reducing the parts you must source separately. However, you should have basic tools and mechanical experience to complete the swap safely and correctly.

• Pulley included and pre-fitted to OEM dimensions
• Mounting hardware included to simplify installation
• Requires hand tools and standard shop practices for safe replacement
• Follow mower manufacture torque specs and safety procedures

How durable is the 8TEN replacement compared with the original?

Materials and construction were chosen to balance longevity and reliability under normal homeowner and light commercial mowing conditions. The combination of SAE 1055 steel for shafts and PA6 for gears gives wear resistance while the polymer case reduces weight and resists impact.

• Shaft material SAE 1055 provides strength and fatigue resistance
• PA6 gears reduce noise and deliver smooth meshing under load
• ASTM D4066 case resists impact and environmental stress
• Engineered to match OEM form, fit, and function for expected service life

Who is this for: This 8TEN transmission is intended for owners and technicians who need a direct replacement for a failed or worn Toro transmission on Recycler 22 rear-bagger and BBC walk-behind mowers (2009–2016, SN range noted). It's a practical option for people comfortable with mechanical maintenance who want OEM-level compatibility, a ready-to-install kit with pulley and hardware, and durable materials designed for residential and light commercial mowing tasks.