This brand new 4runner makes loud groaning sound from the first day until now, every time when transferring from reverse to drive or drive to reverse on a hill road, no matter an alley or a parking way. people who heard of it said it should be a transmission problem and it's bad. because it sounds like something inside is being broken and not sure when it's totally dead suddenly and the vehicle would lose control. i don't know car. i didn't let any mechanic touch it yet because i'm looking for a third party legally to check it and their report would be also accepted by toyota. so i don't have any report about the problem now and i don't know what i should do either. but i really want to know how bad it is and if it's safe to drive. i've been told by a toyota mechanic that another customer who purchased 4runner too from the same dealership shop complained about this sound too. so i report it here. hope you can help! i have over dozen records of the sound, i'd like to sent them by email or mail to you. thank you!