Ain’t no feeling like Oldsmobling!
Too much time bench racing!! Just out of curiosity, TH400 trans, if you machined every surface that has a thrust washer for a bearing, what if anything could you expect to see on a time slip? Ever done a back to back test on a dyno? I would think it would have to be worth something, as much as GM pinches every penny they wouldn’t have spent all the time and effort to machine the 4L80 instead of thrust washers. I’m sure it was more of a fuel economy concern over performance, but reduced friction saves fuel just as easily as reduces ET. Just curious if there is anything scientific to prove or disprove