For many applications, this is a true statement. In some cases, though, it really matters what oil or lube you put in. My Ford Superduty w hydroboost made noise on 3 different pumps until I put synthetic ATF in it. Some PS pumps are sensitive to oil. With a hydro system, it seems to be compounded, IME.

Best of luck w it. I’m actually installing the Redhead steering gearbox in my truck as we speak, I started the job in the afternoon and had to suspend operations to go rescue my neighbors whose car broke down 20 miles away. I think I’ll start another thread about that. :)

Im told by the mechanics the Redhead steering box are the best on the market so far but still not close to the original box that came on these trucks. The GM ones from the dealer will eventually go after about 50k miles. I can understand why can't someone make or rebuilt to original specs or better unless they go hog wild and get one from those off road places that cost thousands.

Good Luck with the rescue, Dennis.