My name is Css.

I have 1996 960 volvo with a little under 200,000 miles, car runs great up untill a last month, i had a engine problem where the #4 cylinder had 0 compression, i done the repairs my self, i removed the cylinder head found both exhaust valves burn out, I replaced the head, since then the car has been renning fine, up untill 3 days ago,i heard a winding noise coming form the torque convertor area of the transmission when it's cold and it go away when the trans gets hot, is there any one know what this problem could be, thank in advance.