I have a standard 2006 9-3 Aero and was having issues with difficult shifting, as well as coolant leaks. I couldn't find the leak itself, and figured it was leaking while driving for much longer than I should have. I don't know the first thing about transmissions or clutches, which are usually the only things I'll bring a vehicle to the shop for, but figured I'd change out the clutch fluid, at the same time as finding where about 2L of coolant ended up. After draining it, and replacing the clutch fluid the car changes gears (though it has been sitting for about a half year now), but wondered if anyone had an idea if this is a gasket, or a cylinder, or what provides coolant through this system, and what my next steps in diagnosing are, short of going to a shop? Any input is greatly appreciated, thank you all.