the flush is a temporary fix, in most cases if the shudder has been around for a while even after oil changes, then there is damage to the clutch.

honda doesnt seem to intent on fixing the issue, they rejected my claim of the shudder when it occured 2 yrs after purchase in 03. eventually we convinced them to ask honda AU to put forward a claim for us to replace it under an extended warranty, using evidence of flushes and oil changes to confirm that we had played by the book and it was still not working properly. Honda pretty much said no and refused the service.

so if thats an indication of how intent they are of fixxing it i would say get the manual