12x2 in Rectangular - 1/8 in Female Thread Inlet - Aluminum - Black Powder Coat - Powerglide - Kit; New lightweight aluminum overflow canister for Powerglide transmissions safely contains high-rpm fluid blow-by. Transmission fluid should always stay in the transmission; while it seems like a simple principle, it can be difficult to achieve. At high rpm, it is not uncommon for fluid to escape through the transmission vent - spreading oil on the undercarriage of your racecar.
