Crispin i had no luck finding that specific post from OilMan so i did a little more research into it and found that hypoid oil has EP (extreme pressure) additives in it to handle hypoid cut gear. GL-4 and GL-5 are just ratings for how much of these extreme pressure additives are in the oil, GL-4...
heya everyone.
so ive been reading through my manual to see what oils i will need to change my transfer case, diffs and gearbox oil. so far it shows they are all pretty similar but slightly different, as the photo shows (sorry its side ways). i was thinking i could maybe get away with using GL-5...
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