i remember a thread on here about a complete teardown of a car that was being built into a racecar and they said the manual tranny fluid circuit was tied into the powersteering pump and cooler, so it is ATF, not actual gear oil. which is a lil weird but not uncommon. many transfercases in trucks uses ATF and some newer gen manuals are usign a specific MTL type lube in the 5w30 viscocity, not actual gear oil like 75w90.
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