I would disagree. Toyota designed this reservoir to not aerate the fluid by design. With my new reservoir I see fluid moving, but now it isn’t spilling out with the lid off. I took apart my old reservoir and see the screen/internal filter was discolored and seemingly partially blocked. I would venture a guess most 80 owners have this issue, but it isn’t as compromising as mine. Coming from the dealership world I don’t know of many brands that even call for a power steering fluid flush maintenance interval from the factory. Most older Toyotas that I’ve worked on over the years have really dark fluid in the system and it’s probably never been touched. Normally these systems are insanely reliable, but given the age and the fluid breaking down overtime it tends to wear the veins in the pump as well as cause the rubber components to break down. I recommend everyone replace that fluid every 5 years or so. And to whoever mentioned it, properly bleeding your new components in the steering before starting the truck as you will cause premature damage. I reverse bleed my systems with a vaccula connected to the return hose so new fluid is sucked in as the old is removed.
and thanks
