They replaced my 36-60-3100V2 under warranty for out-of-spec threads in the motor mount holes. The shaft had also bent when the motor came loose but that was really just collateral damage as a result of the manufacturing defect. I sent the motor in for inspection on a Tuesday and got it back Thursday or Friday the following week so they were pretty quick about replacing it. I had also added a note to them to flat the shaft with the repaired or replaced motor. They soldered the CC Bullets I had on the damaged motor onto the new motor. As noted in my sig I'm running this motor on 4S geared to about 38 MPH in an E-Savage with buggy tires. I've run it at an estimated 45 MPH on the stock 5.5 inch tall monster truck tires and motor temps didn't increase..or maybe just barely...My Mamba Max ESC with CC BEC and 12V fan was getting hot on that run though, probably would have gotton too hot on a summer day. Awesome motor considering the size and price...just wish they would eleminate the vent holes and secure the endbell better for us surface folks.