So along with the oil change, I decided to do something about the "Lifetime Transmission Fluid".
This had been hanging over my head for a long time. Volvo had no service interval specified for it, just check it and add some if it's low. I never really liked the way the car shifted. The transmission never slipped or anything, but high rpm shifts were rough enough that I stopped using Sport mode and just left it in Economy.
The transmission holds about eight quarts, but since there's no sump, only four will come out when you drain it. Common practice is to drain it into a measured container, add the same amount slowly through the dipstick tube, drive for a while, drain and add again, drive again and then do it all a third time. In theory, you end up with 87.5% new fluid in there.
This sounded like an enormous pain in the ass, so I kept putting it off, but I shouldn't have, because it turned out to be pretty easy.
The previous owner(s) must have taken Volvo at their word on the "Lifetime" bit, because even with a foot long 15/16" wrench on the drain plug, I still needed to whack it with a mallet to break it loose. There was a little bit of sludge on the magnetic drain plug, but it didn't look bad at all considering that there are 115k miles on the car. With the car level on the lift, I drained out about 3.75 quarts.
Also, the transmission's dipstick, which has a plastic cover bolted in place and blocking access to it, was stuck to the inside of the tube. I was actually afraid that the o-ring was stuck inside, but it did come out with the dipstick. I used one of those long narrow funnels to add the same amount back in through the dipstick tube and then drove the car about 45 miles.
Shift quality was already noticeably improved.
By the next morning, I already had another car up on the lift, with a third car parked under it, so I drove the Volvo up onto ramps and drained it again. This was a lot easier than I expected and even made less of a mess than doing it on the lift. The moral of the story is, if you have one of these cars, don't be afraid to do a transmission fluid change using ramps. I didn't even get dirty.
Interestingly though, I got and extra eight ounces or so out of the car with it up on ramps than I did when it was sitting level on the lift. It's worth the effort to use a measured container.
There was nothing but fluid on the magnetic drain plug this time.
I still have to do the drain and fill one more time, but I'm waiting for another quart of fluid to arrive from IPD. I also decided to spend $13 for a new dipstick, as they're all plastic and the old one was looking pretty brittle. I was afraid that it was going to break off and drop down into the dipstick tube.