I see in hptuners I can disable the ISS in the trans section. There is no code to turn off though. Wondering if I can build a core 4l60e I have from a 2002 truck and stick in my 07 Tahoe. I know I could add the harness, pump cover, input shaft, and ISS and convert it to the 4l70e config but I am wondering if anyone has done this successfully?