I have it on my 2018 JLU, plan on loosening up the exhaust to slide it in.
I'm at around 117000 miles and decided to swap it out at 90,000-mile fluid change in hopes of it providing cooler temps, it does not.
The transmission temperature has always seemed high to me but apparently there is a heater that keeps it at that temperature.
I just realized I have not put the factory skids back on since the New Year run and haven't checked if it has signs of hitting anything when at EJS but I'm guessing not, there are no leaks. no transmission issues.
Didn't do as I expected and advertised in regard to cooler temperatures, but I figure the bit of extra fluid it holds makes the fluid life operate like "normal" with the 37's and lots of freeway driving, or maybe it was just another thing I've spent money on and didn't need (sadly, plenty of those things)