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Toro Lawn Mower Transmission Replacement

Choose genuine OEM Toro Lawn Mower Transmission Replacement parts to restore self-propel drive and smooth power transfer. Match the right part to your model, then install with confidence. In-stock parts ship the same day, backed by 365-day returns and a price match guarantee.

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Multiple models matched. Select your model to confirm fit.

30 results for 
Toro
Transmission
Transmission, Brake & Clutch
Lawn Mower
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Skill Level (2)
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Product is a manufacturer part
121-9178 Transmission
$135.95

Transmission assembly for a walk behind lawn mower. If the mowers self-propel feature does not work, the transmission may be defective.

Skill Level (3)
skill level dotskill level dotskill level dotskill level dot
Product is a manufacturer part
106-3955 Transmission
$148.31

Lawn mower transmission assembly (front wheel drive). If the transmission is defective, the self-propel wheels won't turn properly. Before replacing the transmission, inspect the belt to ensure that it is providing the proper amount of tension.

Skill Level (2)
skill level dotskill level dotskill level dotskill level dot
Product is a manufacturer part
106-3956 Transmission
$145.22

Lawn mower transmission assembly for rear wheel drive models. If the self-propel drive wheels do not engage properly the transmission may be defective. Before replacing the transmission ensure the belt is applying the proper tension to the transmission pulley.

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Genuine OEM Toro Replacement Parts
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Return uninstalled Toro Lawn Mower parts and products for any reason within 365 days of purchase.
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Get the job finished. Order replacement Toro Lawn Mower parts by 9:00 PM ET, and we'll ship them the same day.
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We'll match any price offered by our direct competitors on all genuine OEM Toro Lawn Mower replacement parts
Genuine OEM Parts Supplier
Genuine OEM Toro Replacement Parts
Get peace of mind with the real thing—genuine OEM Toro Lawn Mower parts.

Genuine Toro Lawn Mower Transmission & Drive Parts

When your Toro mower hesitates, slips, or won't move forward, transmission and clutch problems are the culprit. Repair Clinic carries OEM Toro transmission assemblies, PTO clutches, brake parts, and shift linkage parts that restore smooth, responsive drive control. These critical drivetrain parts are engineered to Toro specifications for durability and compatible fit.

Whether your mower is a push model with a bail clutch or a riding mower with a transaxle, we stock the exact replacement parts. Avoid slow repairs and unreliable aftermarket substitutes—genuine OEM parts keep your Toro running like new and reliable performance.

  • Slipping transmission: Loss of power, weak acceleration, or inability to climb slopes
  • Stuck or grinding clutch: Difficulty engaging blade or drive, unusual grinding noise
  • Brake failure: Mower won't stop or brakes grab unevenly
  • Worn shift linkage: Transmission shifts roughly or won't hold gear
  • Failed transaxle seal: Fluid leaks underneath, loss of drive pressure

Need the right part? Enter your model number to browse Toro lawn mower transmission parts available now.

Toro Lawn Mower Transmission Replacement: Questions & Troubleshooting

How do I know if my Toro transmission is slipping?

Transmission slip feels like the engine revs up but the mower moves slowly or doesn't respond to throttle. The blades may spin but the deck barely creeps forward, or you lose power going uphill. Worn clutch plates, low fluid, or a failing transaxle seal cause this. Don't ignore it—slipping gets worse and can leave you stranded.

What's the difference between a PTO clutch and a transmission clutch?

The PTO (Power Take-Off) clutch engages the blade spindle when you pull the blade control lever. The transmission clutch (or drive clutch) engages the wheels. Toro mowers have both. If only the drive fails, you need a transmission or transaxle part. If only the blade doesn't turn, the PTO clutch is your issue.

How do I find my Toro mower's transmission model?

Check the frame or engine housing for the model and serial number. Write both down and search our parts finder. Toro uses different transaxles and clutch designs across model years, so the exact number ensures you get compatible replacement parts.

Can I repair a leaking transaxle, or do I need a new one?

Minor leaks from loose fill plugs or dipsticks are fixable. Seals and gaskets can be replaced on some models. But if the transaxle case is cracked or internal seals fail, replacement is the safest choice. OEM Toro transaxles are pre-sealed and tested for reliability.

Man examines the dipstick on a gas lawn mower for problems after his mower won't start
Man checking a lawn mower in grassy area

Order Toro Lawn Mower Transmission Replacement Parts Online

Ensure your Toro lawn mower operates smoothly with genuine OEM transmission replacement parts from Repair Clinic. A functional transmission is required for effective power transfer, enabling effortless mowing. Our model number lookup helps you find the exact part for your Toro lawn mower, to ensure the right fit. Enjoy the convenience of same-day shipping, No-Hassle 365-Day Returns, and our Price Match Guarantee for a reliable shopping experience. Facing installation challenges? Our Lawn Mower Repair Help page offers expert guidance. Find additional Toro Lawn Mower Parts for more solutions.

Toro Lawn Mower Model Number: Where to Look

Toro prints the model number on a label or plate on the mower frame near the blade deck, though some models place it on the engine housing or under the seat. Look for a tag showing "Model" or "Model No." and copy the number exactly, including letters, numbers, and dashes. Type it into the model number search to pull up the parts matched to your unit. The model number applies to the entire Toro lawn mower, so it narrows the full catalog to compatible parts across every category, not just transmission or drive parts. Matching by model first helps prevent ordering a part from a similar-looking mower and gets your repair moving sooner.

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Toro Lawn Mower Repair Made Easier with Online Resources

The right online resources take the guesswork out of a Toro Lawn Mower repair. Repair Clinic's diagnostic articles, part testing videos, exploded-view diagrams, and step-by-step written repair guides walk owners and technicians through each stage from symptom identification to final reassembly. Look up your model number to confirm the correct OEM part before you order.

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