Ok all you transmission gurus. I've got a weird problem going on. The trans is a 700R4 with a Hughes converter and a constant pressure valve body. It shifts great but what's going on is after about 20 minutes of driving I start getting a chirp-chirp that sounds just like a belt noise. Pretty soon it turns into a squealing noise at idle (just like a belt) and then to constant squeal throughout the RPM range. I thought the serpentine belt tensioner spring was getting weak until I pulled the belt off while the engine was hot, started it with no belt, and realized the noise is coming from down by the torque converter. Shut the car off and let it cool down and the noise goes away until everything heats up again. Anyone ever had a transmission do this??