The second day I owned my LC I lost all PS effort, and brake booster pressure, sure sent me for a 12pk therapy. Got a pump from Autozing, and a seal kit as well and went to a buddies house who's also a master tech and diagnostic smog tech. Fwiw, no leaks, lost all pump effort, back to manual steering so to speak. He said let's do the deal first, it'll take 20/30 min. Did that, no improvement. Put in the Autozone pump, took another hour as we fought the gear and nut setup. I had PS again, but it was loud AF. It groaned like crazy. We shut it down and bled the system a bit more, cracking the pressure line loose and cycling the steering, and a lot of air came out that we thought was ling gone after just regular lock to lock cycling when we initially got it installed. LSS, it still has a slight groan a year later, and I'm a perfectionist on some repairs, so I have a new pump from Toyota in my garage and a gallon of hydraulic oil (the Mobil brand everyone rants about being the bees knees) so I'll dive into that this winter. That booster isn't bad fyi, when yours goes out. There's room to carefully bend the MC out of the way to get the booster out without cracking the lines open. It's about a 45 job as well.