dbui

Can I use Toyota ATF IV from my transmission for the Steering fluid? I would like to flush and fill the power steering.

hypervish

Yes, that is what it's spec'd for!

You can also use Mobil 1 ATF.

mckellyb

Sure can. It's the same stuff.

Power steering fluid is just lightweight oil. That systems isn't particularly picky about the oil used, as long as it's light, unlike transmissions.

salimshah

There are exclusions ,,, like Honda insists on using Honda Steering fluid only.

If I am not mistaken, for RX you can use Dexron for steering pump. Toyota type IV can be safely used too. Although I prefer and use the synthetic mobile 1 Atf.

Salim

carguy07

I would have to dig for where I saw it, but I'm almost positive that Toyota/Lexus specifically says to not use T-IV, only Dextron. They are a little different.

dbui

Ohhhh man Carguy07 if you find it can you post it thanks! I did the power flush yesterday, might have to do it again if the ATF IV not compatible. Brake fluid flush and fill next.

similar engine for power steering flush and fill.

lexus114

You need to use Dextron fluid in there.

hypervish

I stand corrected.

It is spec'd for Dextron, according to the owner's manual.

However, many people on this forum are using T-IV or ATF compatible with T-IV such as Mobil 1 ATF.

It is completely safe to use T-IV in the power steering system.

lexus114

Yup, I use the Mobil-1 in mine. Works very well.

carguy07

I can't find where I saw it, I think it was something to do with warranty claims on RX330's that were running T-IV, not sure how they would know the difference.

Mobil 1 specs for Dextron, so is basicly is Dextron.

Lexmex

Been using Mobil 1 ATF for this purpose for a long time

hypervish

For comparison sakes, T-IV is also basically Dextron if you want to go with the core components, since T-IV is just Dextron III plus friction modifiers.