Welp, I broke down and gave it my best shot last week... O/OP rant

That's actually easy to change the part, unfortunately it requires Dealer level Detroit Diesel DiagnosticLink access to flash my old MCM values to the new MCM.

Detroit/ DaimlerChrysler will not allow simple LLC / Owner Ops to purchase Dealer Level Diagnosticlink Acess to program these modules.

MCM communicates with the 8 other computers on my truck, so if it's not programmed correctly, it don't work.

FWIW, my PTO on/off switch, is electrically controlled via the MCM to the transmission body controller. Can't just change the physical module.

Hence, I'm stuck.

I wish we went back to days when Mechanical aptitude could fix things. My issue is I have a resistor or capacitor or bad solder joint somewhere in a sealed MCM that is replace only.

 

If it wasn't sunday morning I could flash you my MCM, you could flash a reman, and overnight it to me at the hotel, and I could put it in the morning.

But you'd probably want to get paid for that effort

 

I will say one thing, any mechanic that comments on this thread, I'm gonna have a hard time with.

Especially when they work at a Detroit dealer and use a snap-on scan tool to read the codes on my truck, not DDDL and then tell the service writer they can't find any active codes on Friday at noon.

 

I appreciate the offer, but even having professional level, you still have to buy the 200$ per programming event if your not a Dealer.

It's just such a hassle.

It's like John Deere locking out farmers.