I have no idea where talk about trannies are to be posted, so if this is in the wrong area, EXCUSE ME! (I didn't see an X rated area)

I have a 700r4 and just recently it started acting up on me, it no longer slows the vehicle when I let off the gas. Now it free wheels. In other words, if I am in second gear at 4000 rpm and let off the gas, the engine rpm will drop to 1100. Same in first and third. In O/D it is a little harder to tell. If I speed up to 2800 rpm in O/D and then let off the gas, it seems to slow the vehicle and the rpm only drops to 2000 rpm.

So I was thinking that the band was weakening but doesn't the band only effect second and O/D? Besides all this, during acceleration it is as strong as ever. Hard shifts and no slipping. This is with 500 plus hp plus another 250 shot just for added measure.

The TV cable is set properly and the oil is full.