I will be doing a full power steering flush this weekend, and I just wanted to clarify, exactly what type of fluid to use, for the 1st gen LS400.

I've seen people recommending Dexron 2, 3 and even 4 ATF fluid. Are they all the same?

Also, what is the difference between regular power steering fluid and Dexron ATF fluid?

 

toyota t IV fluid!

http://www.lexls.com/tutorials/steering/psflush.html

 

Well, lexls.com say "Up to 7 quarts of new Dextron II / III ATF fluid (only a few quarts may be needed, depends on how bad your system is)"

Is that the same as Toyota T IV?

 

If you are going to do a FULL flush(reservior, rack, lines etc), then that number may be close to correct. Never hurts to have extra if you need it. Can always use it for drain/fill on trans.

 

******** the PS system needs Dexron III/Mercon spec transmission fluid.

You're off the ball Joe.

Och, Dexron III is the replacement for D-I/II iirc.

 

yes that is my bad.

 

There's no harm in using T-IV.

 

So I'm planning to do transmission and power steering flush next weekend, damn I'm gonna need lots of that T-IV. Looks like I'm gonna need about 16 bottles, and they are like $7 per bottle at the dealer.

 

personally, i'd use the spec designated, T-IV isnt better or worse than DexronIII spec fluid, it's just different.

 

T-IV is available at a Toyota dealer for like 4.99 a quart. I was told that the total capacity of the PS system on a 1st Gen was 2.1 quarts. Why are 7 quarts needed to flush it?

I used Mobil1 Synthetic ATF for the PS. It states on the bottle that its Dexron compliant.

 

I've been using mobil 1 ATF myself and its served me while for years.

 

Lines and the torque converter.