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I have heard either or when it comes to this so I figured I would ask people who know Subarus best. If you flush your tranny fluid and pour in new tranny fluid will your tranny explode?
No... Just use what Subaru recommends as a replacement. The best oil so far for our transmissions is the OE Subaru oil. Other brands have gotten mixed results but the OE oils always have one result... They work.
NEVER use royal purple in your drive train. I read about more people having problems shifting with that stuff in the trany.
Subaru OE fluid definitely works well. Personally, I swapped to Motul fluid when I flushed the tranny, and have preferred it over the Subaru fluid. In regards to blowing seals if you flush the tranny, if that was true, you could never change the transmission fluid.
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