GREAT NEWS! I received my special SSD drive back from Transcend today and it works great in my AVIC-Z1!
No locked drive! The special firmware removed the ATA security functions and I now have a working SSD in my AVIC that I can remove anytime and connect to my PC for updating. I loaded the new updated software via the torrent going around with updated logos and maps.
I'm going to test it throughout the week to see if there are any reboot issues that have been discussed here. If not, then I think we have found a solution!
So far it seems faster, especially when searching, but I can't say for certain if it is just the drive or the new software or a combination.
You can order the drive with the special firmware from Transcend directly. Exact details on how to do that I have to find out from my contact at Transcend, but be warned they aren't cheap. I think the 32GB version is $219.00 and the 64GB version is $330.00
If there is enough interest, I would be happy to do a bulk purchase from one of my suppliers I deal with at work and have the special firmware loaded on them, along with the new updated software for much less than what transcend sells them for.(I think in the $170 range). I am happy to return a favor to the people here who have provided so much good info for the AVIC series.
I'll keep everyone posted with details of my extended testing.
-Ed