E40 ECM TO T43 PROGRAMMING SOLUTION NEEDED!

[tbmsport Profile]

Ok. So we have a compatible E40 ECM (05-06 GM LS Gen IV) to T43 (6L45-90) basic "drive" solution. However, we have a tag-along problem that we didn't anticipate, the PRNDL. Apparently, gear selection signal codes are drastically different and inherently programmed into the CANbus communication (i.e. ignores usual IMS and PNP signals). Sooo, anyone out there who can either suggest a solution or personally do some core rewrite of the T43 calibration to align the T42 IMS signal to the expected T42 PNP signal?

[Tre-Cool Profile Website]

probably need someone clever enough with ghidra to decompile the relevant t43 & t42 os/cals to work it out.

i'd be keen to hear more, i've got a a 6l80e/e40 combo in a mates car via pcs controller acting as the middle man. Was originally a manual though so dont need to worry about the t42.