Something to keep in mind: MTD warrants everything under their own warranty, meaning you are not Tuff-Torq's customer; Stanley/MTD is their customer, meaning the trans oil that MTD puts in it that is the trans oil. You have meet those specifications for an aftermarket alternative. Not what Tuff-Torq recommends. If there is an issue with the trans during those 3 years, it is warranted by MTD/Stanley. They can use the end user using a transmission oil or alternative that doesn't meet the same specification as the trans oil they put in as a way of not warranting the transmission if there is an issue during the warranty period.
John Deere is another brand that warranties every component of their tractors under their warranty.
Meaning even though Cub and Deere buy components from other manufacturers. They treat said components as though they made the parts themselves when it comes to warranty.
Husqvarna and Simplicity are brands that would have you see component suppliers for warranty. Meaning the engines and transmissions, you would see those manufacturers for warranty, not Husqvarna or Simplicity. (not that Simplicity makes machines for the North American market anymore)
So that's where you have to be careful because Tuff-torq will refund Deere and Cub Cadet if there is a warranty issue. And then Deere and Cub, in return, will fix those components under their own machine warranty.
Now, once the warranty is up, you can use what Tuff-Torq recommends or an alternative fluid that meets the same specifications as what Tuff-Torq recommends.
So be very careful even touching the fluid during the warranty period. If Cub says it is sealed, because if there is an issue during the warranty period, Cub will replace the transmission. But if you have changed the fluid and it does not meet the same specifications as what Cub recommends, they can refuse to honor the warranty for said component.
Unlike Deere where You Just Have to Pay for Parts and Labor for said repair and Your warranty goes Back to Normal after the repair is complete . MTD is Known to Void the the warranty for there entire Machine.
