Ok I've read tons of trans posts over the last couple years and have never seen anything definitive about my problem. My trans is J modded and shifts great in every gear except overdrive. When it goes into OD it hesitates and the RPM's jump up about 200 RPM prior to shifting. This only occurs if I am accelerating slowly, if the shift doesn't occur until after 40 MPH or so it shifts fine. The car did not do this prior to being tuned two years ago. I asked the tuner about it and he played it off something about the lockup and shift. Not knowing any better I just dealt with it. I am now worried because when I just changed the fluid and filter recently there was a fair amount of friction material in the pan. Any ideas?????