Yes valve body can cure some shifting issues. If it keeps showing the symptoms, they will go ahead and rebuild.Thanks for the discussion everyone. I am expecting the dealer is planning to replace the valve body in the transmission per the TSB. Given the known design flaw in the clutch drum I am not optimistic of that resolving our harsh shift issues. Particularly since the problem has persisted since day one of ownership at 0 miles, albeit intermittently.
Has anyone here had their valve body replaced and NOT had to return for a rebuild/swap of the transmission thereafter?