[WiiMaster]

Torque converter judder caused by prematurely worn ATF. Software update prevents the ATF from wearing prematurely in the future, the 3x drain and fill gets the worn ATF out of there.

Ask a dealer about it, if your vehicle needs it they can do it.

 

[WiiMaster]

So in other word pointless to get the update if I don’t have any judder.

I wouldn't say it's pointless. If your vehicle is covered (which doesn't last forever, I believe it's something like 8 years/80k) it's worth getting it done. A headache you won't have to deal with.

 

[WiiMaster]

Are we talking about this bulletin? If so, its not about stopping ATF from premature wear (only way to do that is keep it in Honda bottle), but about reprogramming TC lock up clutch.

From what I understood about the update, the TC lock up clutch is what was causing the ATF to wear prematurely, and this wear is what caused the judder (which is why people who are very religious about changing their ATF usually never saw this issue). The update changes the TC lock up clutch behavior to prevent the wear from occurring. This is also why the bulletin states to replace the transmission fluid.