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Just read that thread, I just peruse the 5-ton, not the hot rodding one, so I missed it. Which ECU's have you tested with? All of mine are Eaton ones, not one Dana /Spicer, so that might be the difference. Agree that the FMTV ones look fine, just upside down, but haven't tried it either...

Ouch. Maybe I'm not going to be stubborn.

LONG story that I should have posted a bit ago, but I got ahold of a Spicer CTIS guru after some mean phone tag and reroutes, so I'm not sure I know where I ended up. My plan was to send him some CTIS modules so he could "upgrade" them for the 70 set point. He said wasn't possible, even though...

Be specific, do you have the rp1210a box?

No I meant who has the rp1210a interface box.

http://www2.dana.com/pdf/AXTS-0015.pdf

I knew I had researched this before. It uses the rp1210a protocol and can talk the CAN bus using their software. It's a standard communications box and a heavy truck or mechanic on here might have the right diagnostic tool. I think you can diagnose and also set the parameters of the ECU from...

I don't know the way it tells / checks but the "wrecker" version can be used in the others but will be at a lower pressure, even when upgraded. The 923's will go to 70 with the new or reprogrammed ones, but the wrecker will go to 90. I have several ECU's and would be happy to be a Guinea pig...