Ps fluid

[SteveL]

Just finishing up hydroboost swap on the 72. New pump, hydroboost unit and maybe a bc cooler. What's the best fluid to run? If going synthetic does the old ps fluid need to be completely bled from the existing parts of the system?

 

[garberz]

Lee’s Power Steering always recommend clear GM PS fluid. WildHorses, Jeff Howe and Steerco/AGR recommend Swepco 715. I just installed an Extreme duty Saginaw pump from PSC, the tag on it said, “ do not use ATF or synthetic fluid”. I’ve been using Swepco in the last few pump upgrades that I’ve done.

Mark

 

[sykanr0ng]

I would definitely drain it and possibly flush it before putting new fluid.
Who knows what kind of residue or dirt is in there now?

 

[bronco italiano]

Swepco oils if you can. I use their engine oil (306), Gear oil (201), pwr strg fluid (715) and grease too.

 

[Glass Pony]

I'm in the middle of a Hydroboost install myself. I had Amsoil in it so that is what I'm going to go back to. Hydatech called for GM #1052884 and #12345866 (cold climate) in the 16 oz. sizes.