Daughter's car (my old car): 1999 Chrysler Concorde LXi with 270,000+ miles on it. I waited way too long on this. I did the siphon and fill for two quarts at this time. Will likely do another two quarts in a few weeks before winter and after this change has a chance to clean things. The power steering whine in the deep of winter has gotten worse, so trying to get ahead of that this year but not savvy enough to do a full drain fill.
I called the dealership and talked to a tech on the fluid spec. This was one of the last model/year that they **MIGHT** have used the Chrysler-specific power steering fluid or the Mopar ATF... it could have gone either way. But, they said current ATF+4 supersedes all PS and ATF in the power steering of this model so go straight to that.
I siphoned it out and it came out looking like coffee and had little black dots from the screen in the reservoir. After each drain and fill, did a drive with tight turns to circulate. This car has a deep reservoir so it pulled out a lot of fluid each draining and it turned from brown to mostly red very quickly.
Out: I think it was Versa Trans, but dang I don't remember what the shop did at the time.
In: 2 quarts Valvoline ATF+4 and will likely do this again in a couple weeks... and then a quart or two every year going forward.