The seals and gaskets around the transmission system might also get worn out with time and mileage. The worn-out parts will cause a A lot weaker seal thus making a leak. A bad transmission filter will induce your gears to grind on each other and also your car to surge https://marcotodpb.tinyblogging.com/the-fact-about-filter-gearbox-that-no-one-is-suggesting-77761652