Selected Part Number: Toro 131-3640
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Hydro-Gear EZT Transaxles for Toro 131-3640 / 131-3641 — Left or Right
Overview
Replace the left or right drive transmission on select Toro TimeCutter mowers with a new, genuine Hydro-Gear EZT hydrostatic transaxle. Choose the replacement for Toro 131-3640 left or Toro 131-3641 right using the selector above.
These transaxles are offered for select TimeCutter MX5025, MX5050 and MX5075 applications. They ship prefilled with oil, according to the supplier. Match your mower's model and serial number using the fitment table below.
Choose the Correct Side
| Position | Toro part number | Hydro-Gear part number |
|---|---|---|
| Left | 131-3640 | ZD-AUBB-3DRA-3PPX |
| Right | 131-3641 | ZD-DUBB-3DRA-2PPX |
Left and right are determined while seated on the mower, facing forward. Each linked listing includes one transaxle. To replace both sides, order one left unit and one right unit.
Toro TimeCutter Fitment
Toro's parts catalogs specify 131-3640 left and 131-3641 right for the following mower configurations:
| TimeCutter model | Model number | Serial number range |
|---|---|---|
| MX5025 | 74727 | 400000000 and up |
| MX5025 | 74776 | 401070524 and up |
| MX5050 | 74774 | 404310000 and up |
| MX5050 | 74774TA | 400000000 and up |
| MX5075 | 74768 | 402327412 and up |
| MX5075 | 74778 | 402366555 and up |
These are verified examples, not a complete application list. Compare both the model number and serial number on your Toro identification tag. For an earlier serial number or a model not shown, confirm the transmission number in its parts diagram before ordering.
Transaxle Details
- Manufacturer: Hydro-Gear
- Family: ZT-2200 / EZT
- Type: Integrated hydrostatic transaxle
- Condition: New
- Oil: Supplied prefilled, per the seller
- Package: One left or one right transaxle
Before You Order
Confirm the Toro transmission number for your mower and compare the full Hydro-Gear code on your existing unit's label with the selected replacement. Review the seller's photos for the axle, wheel hub, mounting points, pulley, fan and control connections.
Need help matching it? Send us your Toro model and serial number plus a clear photo of the transaxle identification label. PTO Direct USA offers fitment support before and after purchase.
Buying Through Our Partner
Select the correct side above and click the buy button to view that transaxle on eBay. Complete your order with the seller, whose listing provides current pricing, availability, shipping, returns and warranty terms.