ZHP Steptronic question (new to forum)

Hello all.
I purchased a 2005 ZHP Steptronic just under a month ago. Absolutely love the car!! I traded my old 2000 328i in and what a difference.

I have been reading and searching, however haven't come up with very much concerning the ZHP option along with the Steptronic. I know I know, "abomination" don't flame me.
(got the car for $7,500 below MSRP and have a manual supercharged Miata for when the manual mood strikes)

Anyway, has anyone been able to find out "officially" what is different about the ZHP Step and the ZHP Manual? Other than the obvious "its an automatic". I have read that the final drive is different on the Step ZHP as apposed to the manual ZHP, etc., but is this conjecture or fact? Where can I find the official BMW stats on this setup?

Is the final drive same as normal (non ZHP) steptronic or is it not?
Do I have the lightened flywheel?
Do I have the raised redline?
etc. etc.

The reason I ask this is that my car doesn't seem to shift (WOT) at the +300 rpm mark. It rather shifts before the three hatch marks. Seems to me that the Steptronic is not taking advantage of the supposedly higher redline. If this is the case I am a bit disappointed.

Has anyone used the Dinan Tranny software? Is it worth it to get rid of the Step DBW LAG?
Any ZHP Steptronic owners that can pipe in also?

I appreciate all the helpful info.

Chad

Originally Posted by ChadSWA737

...

Has anyone used the Dinan Tranny software? Is it worth it to get rid of the Step DBW LAG?...

I had the Dinan tranny software on my 530i step. It helps somewhat, but not a lot. BTW: to get the tranny software you have to have the engine software first, which brings the cost to about $800. In hindsight I don't think it's worth it.

Lesson learned: if you want the response of a manual, get a manual. QED.