Hello everyone! I have had similar problems with my box. I took the car to several mechanics and car services but nobody could tell what the problem was, according to them the box was in perfect condition and that was happening because at a distance traveled there are some pieces in the transmission box that need changing, you have to do that once or twice a year. I wasn't happy with this news and started looking for alternate solutions. I came across a service that specializes in transmission cooling systems which according to them prolonged its' life. Well it remains to be seen, I installed it about a year ago and everything seems fine.