Hey guys, new to the community and trying to pitch in where I can. I actually have a 2016 Grand Cherokee as well with 70k miles on it. It's got the 5.7 and 4x4 options on it. I actually had to get a replacement transmission for it at around 60k miles because my wife forgot to mention that the...
What Jimbob said is very much so accurate. By keeping the transmissions internal components at a cooler temperature it allows for the machine to operate at the most efficient rate. Once the temperature begins to rise in a transmission, the internal components can expand and will eventually fail...