6Hp26 harsh 2-1 downshift - possible solution (at least one of them)

[Doru]

First a big THANK YOU to Fmugur - he's a member of this forum.
He owned a 2000 4.4 and he has a 2006 4.8 and another 4.4 with the N62 engine, so he did also a few experiments, and some we did together.
Last week he called me with a new find concerning the transmission. He told me that the ASC module, which is related to wheel speed sensors AND transmission has also to be updated, for the transmission to work flawlessly. And so he did this to his 4.4, without changing ATF - it worked. My transmission worked great, but for the heck of it I also changed the software for the ASC which was big time outdated. I had no idea, until SSS Progman showed the version I had and the version it will replace it with.
After re-programming the ASC, the shifts were even smoother. Up to that point I thought I had a flawless transmission, but after the update, the truck is extraordinary smooth, better than a Cadillac, no exaggeration. Extremely happy.

So if you consider servicing the transmission, after changing ATF, seals, etc, update and re-flash the mechatronics module, followed by updating the software for the ASC module. The results are stunning.

the ASC updating takes about 1/2 hour with SSS progman.

[kvc]

Originally Posted by Doru

So if you consider servicing the transmission, after changing ATF, seals, etc, update and re-flash the mechatronics module, followed by updating the software for the ASC module. The results are stunning.

the ASC updating takes about 1/2 hour with SSS progman.

For someone who has little knowledge about this process, could you please provide a step by step list of what I should do? I have already serviced the transmission (filter, seal, fresh ATF followed up by another drain & refill). The only scanner I have is PA soft which I've used on one occasion only.
The PO had the alternator changed over, just before I purchased the vehicle and said that the battery had gone completely flat at one stage. This lends me to think that a re-flash of the mechatronics is required, along with anything else needed to get my ZF six speed to work as it should. I have no idea where to get the software/re-flash or update for the ASC module. Are these readily available on the internet or can someone please provide them? All suggestions/advice gratefully accepted.

[Doru]

You need a laptop Win7 64 bit, the faster proc. the better, at least 4Gb mem & reasonable Hd. You can find used Dell's for around 100$ then you need to buy this here
Then you need to get familiar with the software. Normally when programming, you need a 40Amp power supply (newer BMW's need 70Amp). They prefer the Deutronic DBL800, but it's very expensive.
I was successful using a 12 Amp battery charger (not recommended for programming) so your risk.
The cheapest power supply I found is around 450-500 Us $, which is out of reach for me looking at the exchange rate from CAD.....