Rudy Rules

I got a 2015 Journey SE's and 11,000 km. I have a problem with the gearbox, when I'm on a highway and it has an inclination I cant pass over 60km/hr because the gearbox gets really hot and starts licking oil from the transmision. It amazing how slow it could be if its going up. And the changes of gear it makes it at 5900 RPM, and dont allow to use the manual changes. I hope it is covered by the warranty.