Quote:
Originally Posted by c1pher
I guess it's more expensive to properly mill the gears/teeth than to get the diff fluid changed out in short order. Or maybe there is some sort of fitted mating that occurs between the teeth as you break the car in that is unique for each vehicle....I dunno.
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I also just learned the bmw diff fluid comes with an expiry date stamped on the bottle that’s about 2 years from production. Just something I never noticed or paid attention to with other non bmw diff fluids…. Makes me wonder if it has a shelf life that’s only 2 years then does this mean it should also be drained out every 2 years?