Best Oils for AWD Gearbox & LSD Rear Diff?

[AlpineRaven]

What is the best oil I should put in AWD Gearbox & LSD Rear Diff? (LSD is from RX Leone).

Its for my Liberty.
Whatever the price is but I want the best oil to use.
Cheers
AP

[tim_81coupe]

Redline Lightweight Shockproof in the gearbox, and Redline 75W90 gear oil in the LSD.

I run both of these in my coupe and have found them to run quieter and in particular the gearbox selected easier and whined less.

[AlpineRaven]

Redline Lightweight Shockproof in the gearbox, and Redline 75W90 gear oil in the LSD.

I run both of these in my coupe and have found them to run quieter and in particular the gearbox selected easier and whined less.

Where do you buy them and how much were they?

Heard that Redline stuff is good but doesn't last long am I right?
Cheers
AP

[tim_81coupe]

I buy them through my work, at not much cheaper than retail price. Don't pay any more than about $40 for a pint of diff oil and $130 per gallon of lightweight shockproof.

Redline oils use a polyolester base stock, basically they're made from palm tree oil. This gives a much smoother oil that with less refining outperforms standard mineral oils on every front. It's really the only true synthetic oil out there, Mobil1 and the like exploit a loophole that allows them to market as synthetic oil, but they still use a mineral base stock.
Polyolester is the only base stock approved for commercial aviation use. Mineral oil is simply too unreliable.

Oh - and about the life of the oil, lemme put it this way. When you use Redline in the engine, you change the filter about every 10,000kms. You drain the oil into a clean pan, swap the filter and refill the engine with the old oil! The oil will outlast the car.