Thought I'd add a couple of comments here seeing as I attempted a dry change over the weekend.
My auto is in a 2007 Pathfinder. It
does have a dipstick but it was a right pain getting it out. Very confident the mechanic I paid to check over and replace all fluids (incl ATF) when I first purchased this car lied through his teeth when he told me he checked it and it was fine. Lemme tell you that dipstick has not been removed in yearrrrrrs. Once removed a bit of rubber grease on the o-ring on the inside and it's fine now.
When replacing the filter, while it is mostly all straightforward upward facing bolts holding it in place (of various lengths, so record what comes from where) there is also - for some dumb reason - three
loose downward facing bolts which have nuts on the end. Just be really careful when replacing the filter pan that you don't accidentally push one of these bolts up. I gently placed the new pan over these then first then pulled it sideways to hold them in place with enough friction to do up the nuts. No idea what the engineers were thinking with that one.
There was no allen key overflow / drain plug in the pan or otherwise on mine. Presumably because my model has a dipstick that is not necessary.
Initial drain via the pan only netted about 4 litres for me. Dark brown colour in my case, further evidence of the aforementioned porky pie by the mechanic.
Given its 10.3L capacity (according to the manual), I still had circa 6.3L of old ATF in the torque converter, cooler lines, etc. I got this out by removing the ATF return line to the transmission from the cooler and running the car. I expected the return line to the one which came from the
bottom of the ATF cooler, logically thinking it would be gravity fed. Its not. The return line comes from the top of the cooler. When you are looking at the transmission the return line is the one closest to the back of the car.
When removing and replacing the line, just remember there's a copper washer on both sides of the banjo bolt. It drops out a little sneakily on removal.
I believe the manual (and
@Cuda above) says to run it until new ATF comes out, but mine starting running out of ATF before that happened so I presume you need to be simultaneously pumping in the new ATF to do that. We were not able to do that. In my case I ran the engine until fluid stopped consistently coming out, lowered the car, topped up the ATF, then did it again. On I think the third go the new ATF started coming out.
I put a full 12L in so it looks like we pumped out about 1.7 of the new ATF via the return line. It was dark at that point so I'll blame it on the light, my helper or both. We also lost some (new) ATF when we started it with cooler hose removed, mistakenly believing it to be the return hose (as per above). Either way, based on the grotty fluid we removed, I would rather put too much new ATF in than leave any of the dodgy stuff behind.
Messy job. Keep wood chips or your absorbent material of choice handy.
That was just my experience. Happy for anyone in the know to offer any corrections or advice for my and others' future benefit.