Any ideas to give me background on this transmission problem before I take it into the shop for a full-blown diagnosis would be appreciated. 1990 coupe with 120,000 miles. The transmission recently (past 100 miles) has started wail/roar at higher revs and changes are getting rougher. Here's the situation. When driving and gently accelerating everything is fine up to about 2,500 revs. Above this the transmission starts to wail/roar. If it changes up before it starts to wail/roar fine, otherwise the changes is abrupt and getting worse as I do more miles. My guess is that this is a torque converter problem, maybe something to do with the lock up? Here's why. In both Park and Neutral, when I increase the revs I still get the wailing/roaring above about 2,500 revs. Should add, no error codes whatsoever. Help, advice, guesses welcome. Joe Q