Farino81

iTrader: (1)

So lately my P/S has been making alot of buzzing noise when I turn the wheel. Fluid level is good and was changed about 20k ago. I have a 94 sc400. Does it sound like my pump is going out or my p/s rack?

SC400slide

iTrader: (11)

If fluid level is going down and there is white smoke coming from the exhaust, then you have a failed vacuum valve, the PS pump also will do this when low on fluid, but if level checks out good then the PS pump could be worn out.

Kris9884

iTrader: (7)

Yeah if the fluid is not depleting then its a pump on it's way out. Mine's been doing the same thing for about 2 months and recently getting worse and harder to hold the wheel while turning. It's last leg..