So I recently picked up a 2022 DDSRT with 32,000 miles. Since diff fluid changes are called for at 30,000 miles, I decided to do the service yesterday. Front change went fine. Pretty straight forward. Moved on to the back. Drained the old fluid, pumped in the new fluid until it dripped out the fill plug, then reinstalled the fill plug. Here's where the issue arose. When I went to reinstall the fill plug I noticed around the hole were the words "Do Not Open". I didn't see this initially and thought that was weird at the time as I did not see any other fill plug. Both the drain plug and the fill plug were allen head bolts. All others were torx or hex. This morning I decided to find a video on the procedure for changing the rear diff fluid in a DDSRT. It turns out the fill plug is on the side of the diff. I am obviously concerned that I may have a problem if the new fluid did not fill the ring gear housing. I don't know where else it could have went as the fill plug I used seemed to be the right height and it took about a 1.2 quarts, which is the amount called for. I plan to pull the correct fill plug today after work and adjust the fluid level from there. I have to think the height of the two plugs were relatively close but I drove the durango to work today and am worried I may have damaged the gears if the fluid did not make it into the differential. Can anyone shed some light on this possibility? Thanks.