Better yet, go brushless and hit the dirt/track/street and bash like a bat outta hell!In the manual it states - "Always ‘Run-in’ your vehicles brushed motor prior to use. ARRMA recommend supporting the vehicle with the drive wheels clear of the ground and run it at constant, low to half throttle for at least three full battery packs."
It may may not help to run-in the motor but worth a try if you get a replacement ARRMA MEGA 15T brushed motor under warranty.
The manual also says to keep an eye on motor and esc temps - "Check motor and ESC temperatures regularly, especially in hot climates. The maximum safe temperatures are:
• 70 degrees Celsius / 170 degree Fahrenheit for ESCs.
• 80 degrees Celsius / 180 degrees Fahrenheit for motors.
• If motors or ESCs exceed 95 degrees Celsius / 200 degrees Fahrenheit it can shorten their life or cause failure. If in doubt regarding temperatures, allow your vehicle time to cool down between runs."
I bought an inexpensive infrared temperature gun for $ 15 which works great for checking the temps.
Also, the Traxxas 12T Titan motor is a good inexpensive upgrade motor to use in place of the MEGA 15T motor.