I'm hoping the EPROM is good. It is CZSU one which was only used in 2001 with the HMMWV. Interestingly enough the technical manual states it has downward compatibility to 1997 and are interchangeable to 2007. Not sure what the difference between the words "interchangeable" and "compatibility"...
Have been searching other part numbers and ran across a different part # (73-80106) made by Cardone. Its only $230 which is more than the original $90 dude, and it looks like it matches the same model year vehicles 94 thru 99. If I was gonna make some cool awesome truck, I might consider some...
So, I bought a "2001" HMMWV, which has a 4l80E in it which has an EPROM. The vehicle was in limp mode, and the TRANS light was on, but would not launch diagnostic codes. removed TCM which is contained in a 'waterproof' box, to find it is nearly filled with water. I removed the TCM and lightly...