So, I tore apart one of my pumps today since it apparently wasn't working and here is what I saw:

http://i.imgur.com/nWyvomq.png

http://i.imgur.com/dyuP4IS.png

I have the dreaded D45 red light and I cannot seem to solve the issue.  I know its not the the thermal paste - successfully changed that on other TMs with no issue.  I used a mechanics stethoscope to listen to the pump and it seems normal, shows a normal RPM on the STATS page but for whatever reason (according to the diags) the cores overheat and immediately shuts down one board.  Tried swapping the connectors, pulling the J11 and a few other things but no luck.  

For what its worth, I haven't taken apart the other side of the pump since I didn't have fluid to replace what I would have lost had I done so.  Does anyone know what type of fluid it uses?  Perhaps I'll try that and take some pictures next.

I see others have had this issue but nothing I seen discussed thus far seems to solve my issue.

I reached out to this forum to purchase a used pump/radiator setup - waiting to hear back.  If not then maybe I'll try to the other suggested setup with the dual radiators.

Any new advice out there?