So as the very first post asked repeatedly;has anyone found the actual solution (or the cause at least)?NV8 RPO appears to be problematic box code(whatever vehicle/colour/trim)TSBs issued and fix appears to band aid a problem.Where did the “play” come from other than wear.Adjust out the slack does not account for the new “space/play” that was created over time.(I assume metal filings in pump/hydro boost system after endplay adjustment made.Partial flush from box removal/replacement.Suspect the GM replacement boxes also have the same basic issues.NOBODY seems to actually know root cause(ie:gear hardness/metal deficiency/fluid inadequacies/pressure or flow problem/contamination from manufacturing processes.Endless forum guesses but zero facts or fixes and alternatives put forward.
