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I took the leap of faith this morning and ran the software update for my transmission. After researching how to use WinFKP a bit more and understanding how it selects the software numbers after I select my gearbox I gave it a try and it worked. I charged up my battery overnight with the small ctek charger and left it connected. My battery is only a couple of months old and from my research the update takes 20-25 mins so I crossed my fingers and it held out. It is a tense 25 mins while its happening.
Did it solved the 2-1 harsh downshift? Almost, it does drive very nice now and i'm glad it is running to latest software for that model gearbox. It does seem to shift from 2-1 a little before it comes to a stop which makes it less pronounced. If I roll really slowly to a stop I can reproduce the 2-1 bump so hasn't cured it 100% but its less present. Having the fluid and seals changed has definitely made it much better to drive. It must have low on oil because it always used to have a strange shift from 1-2 when turning when cold, almost like it would fall out of gear for a second. This would only happen when cold and went away once it was up to temp. Since having the fluid and seals changed this has not happened again.
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