I worked at a Dodge Chrysler and Jeep dealership and people always complained about this. Now I work at a GMC and Buick dealership and people still think the ticking is bad (its Not). I traded in my Ram 5.7L for a Serria 6.2L and I had ticking and clicking in both engines. Thats because of direct fuel injection (Which has already been stated). Its completely normal to hear. my Ram made a louder ticking noise then my Serria plus I had to change my Rams transmission 3 times before I put 170 thousand miles on it. Not trying to sound biased but I've worked for both companies and GM has an older engine design and never had a problem. It can be annoying with the ticking but it will last longer then the ram in every aspect.