Hello all,

My son just purchased an 85 735i, not having a manual (yet) his PS pump is making an awful noise when turning the wheel and pressing on the brake pedal. I have been reading thru this forum and I'm confused. I was under the impression that the PS and brakes used the same fluid, then I read use ATF for PS and DOT4 for brakes. Could someone set me straight?

Thanks in advance!