What are people here running in their ARB equipped diffs?

The reason I ask is that I called ARB today to ask about getting my compressor fixed and why I'm going through so many o-rings, and they said that if you use oil with limited slip friction modifier, it can eat the o-rings.

I find this kinda hard to believe, as almost all synthetic is suitable for use in limited slips, and I know a lot of people are running synthetic ...

 

I run just straight 85W-90 dino juice. No LS additive.

 

I am just using Castrol 85w-90 regular diff oil. No problems.

 

I use 75W-90 Royal Purple synthetic and have had no issues.

 

Mystik SX-7000 Synthetic

 

Amsoil Severe Gear Synthetic 75W-90.

 

I don't have one personally, but since it's not engaged all the time, it shouldn't need anything other than regular diff fluid.

 

same here.
i now have about 500 miles on a new arb and new gears. i might go synthetic when i change it, i've always been partial to redline.

 

I've run Redline Shockproof GL-5 gear oil in mine for about 7 years now, works well:
- http://www.4crawler.com/4x4/index.sh...ntheticGearOil

 

Yeah, I run heavy shockproof based on your experience roger...

of course, I think back to the over a year where I had no issues with the locker in the Heavy Shockproof and think if it were the oil, I would have had the problem then...