I had PM'd Darby back on this one with my comments, figured I'll post 'em here too in case you're curious...
MrMopar64 wrote:
Sorry I haven't gotten back to you sooner, homework has been a bear tonight!
At first glance, the concept of it seems very enticing. If it were going into a street-rod application I can see it being a real gem; going into a production-OEM application I can see it being a bit of a challenge - not for the weary!
My first concern would be of the wiring interface between that box and the vehicle. I'd be inclined to pursue the approach of making a connector between the OEM transmission wiring harness and this unit instead of building a new harness from scratch.
The next concern then would be that the PCS box has enough drivers for all of the control solenoids inside the 545RFE. The website claims that it is already supported; however, I'm not able to find any base calibrations which leaves me somewhat skeptical.
Looking at it from a software/calibration perspective, first issue would be calibration of the CAN bus. In the OEM environment, many of the things that the PCS box acquires through analog signals are instead transmitted over CAN. While the PCS unit is able to send/receive data on the CAN bus, you would have to find a way to calibrate the CAN bus to the DCX specifications so that it will receive the proper data from the ECU and send back the required info. Getting that info from DCX would be challenging to say the least.
Also a challenge would be setting up the calibration in the software. From the research I did on it, I'm still somewhat skeptical of its robustness. While it seems to have the needed features, I can see many months being spent on trying to get a calibration that feels remotely similar to the factory TCM so that you can then begin to improve upon it.
The one thing I don't like is lack of diagnostics. If something goes wrong, it has no way of saying "hey, this solenoid is bad" or "hey, the transmission is slipping too much" (efficiency is something that the oem TCM calculates and maintains) which could leave the user stuck with no idea what to fix without having a way to easily put the oem TCM back into the vehicle. Also, going to the dealer with that in there would stir up a world of trouble re: warranty.
All in all, I can see if having both its pros and cons for sure. If it were something that I was going to seriously consider, I'd most likely wait until the warranty is up before I tackle a project like this.