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I just did an ATF refill in my my small Daihatsu Sirion (1.3 inline 4 / 100hp, 4spAutomatic with sportshift buttons, just 900kg unladen weight) and found out that the ATF is used to lubricate the front differential too on this vehicle.
Why is separate gear oil used to lubricate the front differential on the Forester and other Subarus? (..being also an Achilles' heel for the 4EAT if cracks develop because of possible TC overheating causing smallish leaks that can destroy the diff over time).
Why is not the diff just left to be lubed by the 4EAT's ATF?
As you guys over the pond have mostly automatic cars on your roads, what is the general rule for FWD transaxles over there? Separate gear oil for the differential or ATF?
Why is separate gear oil used to lubricate the front differential on the Forester and other Subarus? (..being also an Achilles' heel for the 4EAT if cracks develop because of possible TC overheating causing smallish leaks that can destroy the diff over time).
Why is not the diff just left to be lubed by the 4EAT's ATF?
As you guys over the pond have mostly automatic cars on your roads, what is the general rule for FWD transaxles over there? Separate gear oil for the differential or ATF?