After hearing a squeeling from my 1994 A4 Trans while in drive i decided to check the function of everything with my snap on diagnostic scanner and found that the TCC duty cycle was staying on 100% at idle with the car in drive and after you start to move, it would switch to 10% and stay all through the pedal range. I remember checking it a while back and noticed that it would fluctuate between 0-100 depending on how hard the pedal was pushed......... any clues????? TCC solenoid going out?