I have a small issue I need some help with. I have a very early build 2005 300C. It of course has a EGS52 TCM in it. The software build that pops up on the EVIC is March 2004 so she is one of the first off the line I think. Anyways my Diablo T1000 can not communicate with this TCM. Frankly it has never been a concern for me till now. I have a GETRAG 3.06 rear carrier to swap into the car. Since I can not communicate with the TCM I can't change the gear ratio with the Diablo T1000 to 3.06!!!! I figured I would just snag a EGS53 TCM out of one of the car from my local used parts yards. But it seems out of the nearly 40 LX cars they have sitting in their yard none of the Hemi cars are 07' or newer!!! Go figure. Anyways I have a friend with a 2006 SRT8 rolling chassis that I can grab the TCM from. It of course is set with a 3.06 ratio already. I assume I can use the SRT TCM and it is a simple plug and play swap correct? Thanks for any help.