ARB airlocker diff oil?

When I bought my airlocker (RR 10 spline) direct from ARB about 9 years ago, they stipulated that i should run limited slip diff oil to protect the o-rings and seals. The diff i bought was old stock and had been sitting on the shelf for over 2 years, the o-rings failed after about 2 months. When i went back to ARB, they said "what kind of oil have you been running in it?". When I said 'lsx90 just like you told me to' they said no problem, seals must have dried out on the shelf- rebuilt the diff as warranty job. That diff has been working without fault for 9 years/about 300,000km on lsx90, (except for when all the crown wheel bolts came loose last year:(- and I don't think that is oil-related).

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Originally Posted by POD

When I bought my airlocker (RR 10 spline) direct from ARB about 9 years ago, they stipulated that i should run limited slip diff oil to protect the o-rings and seals. The diff i bought was old stock and had been sitting on the shelf for over 2 years, the o-rings failed after about 2 months. When i went back to ARB, they said "what kind of oil have you been running in it?". When I said 'lsx90 just like you told me to' they said no problem, seals must have dried out on the shelf- rebuilt the diff as warranty job. That diff has been working without fault for 9 years/about 300,000km on lsx90, (except for when all the crown wheel bolts came loose last year:(- and I don't think that is oil-related).

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When we took our front locker apart the other day all the crown wheel bolts were loose aswell:eek:
Thanks POD:)

CHEERS TIM.

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Originally Posted by rick130

FWIW, ARB recommend a non LSD oil and this is the reason I was given.

According to an ARB engineer on another board LSD fluids may contain abrasive friction modifiers that will abrade the 'O' ring.
I called BS as no friction modifier I know of will do this and if they did, diff's would have failing pinion and axle seals all over the place, but he stuck to his guns... :rolleyes:

A blender I speak to confirmed what I thought.

My opinion, FWIW is that either would be fine.

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I take it you mean this thread Rick? Outer Limits 4x4 Board :: Log in



I believe daniel is also a member on here as well...

I have front and rear arb lockers in my landcruiser and have always run LSD oil as was recomended by ARB never had a problem and this the second cruiser that I have fitted air lockers to.
might fit some to the disco one day to if the boss (Handbreak)will let me

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Originally Posted by isuzurover

I take it you mean this thread Rick? Outer Limits 4x4 Board :: Log in



I believe daniel is also a member on here as well...

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Yep, that's the one :D

I couldn't be bothered digging it up Ben, thanks. Shows the memory isn't as bad as I've feared.
I'm still unaware of anyone using MoS2 as an LSD additive, but..... :confused:

Penrite Synthetic Gear Oil (costs about $30 per diff).