I was browsing the other rwd forums (man, the 900 room is soooo polite; people ending their post with "sincerely") looking up info on transmission characteristics of the aw70 with lockout torque converter. also in the archive searches, I've noticed some interesting description of "slipping." now, my basic understanding of a slipping tranny is when your car is in gear and you're driving and all of a sudden you feel and hear yer engine rev and your car not moving forward at pace with the engine. that is my understanding of a slipping tranny. but, in some of the posts, I hear people say they can feel their tranny slipping out of gear, but not in the manner how I described it. can one discern a subtle slip at driving speed and how would it be described?then there is this one that raised an eyebrow. this person was saying how after driving 30 minutes at freeway speed and then returning back to stop-and-go traffic, his 4th/OD gear would not engage until he hits 45-50Mph with revs at 4000-4500. he asked if his tranny was slipping because he had to rev his engine to shift to 4th. does slipping only mean when your tranny doesn't shift at all or only "shifts down"? or does slipping also refer to when your car revs and makes the tranny shift at a higher speed?