I was wondering if anything ever came of this? I think I have the same thing. When I am cruising, usually in 3 or OD, and barely on the gas, there is a slight erratic pulsing in the car, it is slightly audible too. When I give it some gas, it's fine, of if I come off the gas completely, it's fine. It only happens with a tiny bit of gas pedal pressure. I've dismissed it as a problem not to worry about so far. I have 009's that are only a year old and have about 1000 miles on them, and I kind of doubt it's directly related to my tranny since I think it used to do it with my old tranny and now it does it (slightly more noticeably) with my new built up tranny.