Disco 3 diff oil

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Originally Posted by CanadianRyan

Hi all,
Quick question - what oil for the rear electronic diff? I can find lots of info about the front taking 0.61L 75w/90, and the non-E rear taking 1.1L of the same... but the only thing I've read about the electric option is that it takes 1.5L of "special oil"... what's so special? Cheers
Ryan

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I'm guessing the price is very special.

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Originally Posted by loanrangie

I'm guessing the price is very special.

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It is because LR oil is the only oil to use,unless you want to pioneer with something else....

Not sure you can actually buy it other than a LR dealer but the oil is Castrol SAF Carbon Mod Plus

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Originally Posted by garrycol

Not sure you can actually buy it other than a LR dealer but the oil is Castrol SAF Carbon Mod Plus

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That exact same oil is also available as a GM part you can get from a Holden dealer. I don't have the p/n handy but a quick search will bring it up.

Even at $80/L I'd recommend changing it regularly as my front diff had to be re-ground $1000 vs $3000 for new IIRC. I could understand long service intervals if it had a lot more than 600ml of oil, I think that's a Super-size Coke.

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Originally Posted by DiscoClax

That exact same oil is also available as a GM part you can get from a Holden dealer. I don't have the p/n handy but a quick search will bring it up.

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Yep - also used by Holden.

92184900 is, I believe, the GM part number for the Castrol SAF Carbon Mod diff oil. Comes in an ACDelco bottle. Easier to get and much cheaper than the same stuff in a white bottle with green oval sticker on it... yes, even from a Holden dealer.

I researched this when I thought/hoped/dreamed my RRS was fitted with the elusive e-diff (as advertised) but alas mine is one of the 81% of TDV8s where that option was not fitted... Stupid, stupid first owners... Now I wish I had the problem of sourcing this oil.

Does the e-diff have friction plates like an LSD ? cant see why it needs special fluid if it doesn't .

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Originally Posted by loanrangie

Does the e-diff have friction plates like an LSD ? cant see why it needs special fluid if it doesn't .

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Yes it does. There is a motor which drives a multiplate clutch and gives variable lock up.

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Originally Posted by garrycol

As Dave said.

· Rear diff oil – 1.1 litres of Castrol SAF-XO - 75W/90 spec grade oil
· Front diff oil – .61 litres of Castrol SAF-XO - 75W/90 spec grade oil

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So I've been trying to get this oil, apparently it's been superseded, the "new" product is Castrol syntrax universal plus 75w90, is this stuff the go?

Cheers James