I think cooling every 5 minutes is ridiculous and it's supposed to have a high temp shut off to prevent damage (guess it's over 200F). I'm going to get a heat sink for the motor and a better heat sink for the ESC and I'll cut a hole in the body.
The truck is a lot of fun but I don't think Traxxas should advertise that a truck is capable of something if it's only for a few minutes on the street.
Having said that, I'll probably put the stock gearing back in because 70mph is too much speed for the truck, or my local track.