So I've been having so many issues with the transmission swap and have pretty much decided to not run a conversion harness (using a 4L60E tune) to run my 4L80E and actually run a native 4L80E tune. I will be using the Frost Harness I have but it'll be stripped of both relays. It will be used to only swap the PWM pin over and also have the PRNDL switch harness integrated to it as 2009 didn't have an external PRDNL switch). I have already wired in the ISS to the Trans connector harness (again, 2009 had a ISS). I have pretty much checked schematics for both harnesses and they are landed inthe same location on the TCM so everything should be wired correctly except for one wire on the TCM that needs to be moved from location 45 to 26 (ISS Low Reference). I just need to know for certain that the TCM is going to swap the B-solenoid output when the new tune is flashed.
I've found two tunes online and one of them has the same operating system as mine. I've uploaded mine, and the two tunes I found. Can someone verify which of the two 2007 or the 2009 G3500 tune on the T42 controller would work hand in hand with my E38 ECM?
My 2009 E38 ECM ... OS 12630501, CAL 12630500
My 2009 T42 TCM ... OS 24243356, CAL 24240449
2009 G3500 T42 TCM ... OS 24243356, CAL 24235753
2007 T42 TCM ... OS 24235341, CAL 24230461
Currently, even though I had a feeling it wouldnt work, I wired the ISS in and set the 4L60E tune to YES for that option as it was originally ... well it'll work fine for a little and then set a code before the TCC starts turning on and then off within a second, over and over (when it's in range per tables). I'm assuming the ISS pulse count is different between the 4L60E and 4L80E .. not sure of the code 'cos I didnt have a scanner on my way home from the shop and the only thing I could do was hit clear codes on my bluetooth OBD-II adapter ... it'll run fine for a bit and then trip the trans code again before acting weird.
Using this as a guide ... https://sites.google.com/site/sloppy...-nnbs-t42-swap