Last weekend I decided to change transmission fluid on my ‘17 gas XD. I bought the truck used a year ago with only 13k miles and with it now approaching 21k miles, I decided it was due. Upon finding no transmission dipstick or fill tube under the hood, I was curious how I was going to refill the fluid but I forged ahead anyway and removed the drain plug and dropped the pan. Whoa! I have never seen such dirty trans fluid (brownish-black) and filthy magnets! Especially with such low miles! I have no knowledge of the previous owner(s) or their possible towing history with this truck but it sure seems like I was looking at 90k mile trans fluid instead of 21k. I re-assembled everything and refilled the fluid using that tiny fill tube on the bottom of the pan. Just wondering if anyone else has found a similar situation with dirty transmission fluid. Overall, the truck shifts fine and I haven’t noticed any problems.