That's one point I've been trying to research. Thus far all I've found is that the rear-ends don't contain any yellow metals- ring, pinion & bearings - steel.
It is an oil that I'd hesitate to use in a synchronized transmission due to corroding danger to the synchros...plus, GL4 is just better in that application anyway.
Just trying to make sure the oil will take care of the hypoid gears (if that's what's really back there - wouldn't they just be regular bevel gears?)
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