Originally Posted by
rick130
If anyone wants reduced noise and wear in their steering system, use a tractor/heavy machinery hydraulic fluid or a low viscosity tractor UTTO fluid if you can pinch some from a farmer, eg. Mobilfluid 424, Fuchs Titan UTTO 10W, etc
Much higher levels of anti-wear and extreme pressure additives compared to most ATF's with anti-squark additives so no noises/groans etc from the steering at full lock.
Having said that, I've used Castrol Transmax Z ATF in the Patrol PAS since it came out of warranty, it's now past 420,000km and I've never needed to adjust the steering box, nor has it ever developed a single leak or even a smudge of oil anywhere.