The cap expressly says to use ATF. I had a new rack and tie rod ends installed and the mechanic used general power steering fluid. After a couple days of driving it, the steering got hard as a rock at the 10 and 2 positions. I flushed it a few times with Valvolene ATF and I haven’t had any steering feeling issues in a couple years since. Take that anecdote for what it’s worth.I'm going to get my snow tires put on soon and figured I'd have Toyota do a PS flush while I'm there. The price isn too bad .
So they claim they hook up to the lines and run a cleaner through the system and then refill with power steering fluid.
I told them the manual calls for ATF but they didn't give a F....said power steering fluid is fine and that the new rack we just installed came from the factory with PS fluid anyway.
Should I not care and just let them do it or do it myself and us ATF like everyone else is doing.
Factors for doing it on my own....Gravel driveway, getting cold, im lazy.