[ImperialCrown]

The 'R' in front of the actual OEM part # stands for 'remanufactured', so your actual part # 4886671 is correct.
The Mopar remanufactured catalog is here: http://www.moparpartsworldwide.com/moparreman.pdf
I see yours listed as a 5.2L, A/T, CA, Fed and RFI-suppressed unit on page 50. It is the only choice.

 

[buba_zanetti]

Wow, that's interesting that all the 5.2L engines on that page are CAL versions, and the 5.9L have CAL and FED-only versions. Well thanks for the answer; that cross-reference is mighty handy! All the computers I was looking at online had entirely different numbers so I was really suspect of what I had. I did manage to find one with that number though.

Out of curiosity, do you know the difference between the part I have (AB body) and the AN and BR body versions? I assume they are Ram pick-ups, but I wonder really what is different with the other versions. Since I don't currently have to pass smog (Arizona registration) I could maybe find a better price if I broadened my search to inslude the other versions. Or heck, maybe a truck computer would be better since all I ever do is tow with it?
Thanks,
b-z-

 

[valiant67]

AN would be a Dakota computer. BR would be the Ram. I would not try to switch between body styles because the calibration is not that different and you might introduce a security system issue if the truck computer has security enabled or if the options the computer expected to see between a truck and a van were different.

According to the reflash list I have, part number 4886671 is listed as the reflash for 56028348 so if you see 56028348 it would be a compatible computer only with older software.

 

[buba_zanetti]

Right on. Thanks Valiant, you were a huge help and saved me a mistake. Aside from motorcycle and aircraft ECU's the only experience I have is with my father's old S10. It had different part numbers but according to him all of the maps were on the ECU and it would figure out from signal pulses which engine it was hooked to, "unlocking" the other map. He put a V8 ECU in his V6 and it did run rich for several drives, but eventually it passed California smog all on it's own.

Based on that past experience I was expecting any '94-'95 ECU to work if it was for A/T. Fortunately my expectation of Murphy's law to show up led me here. You saved me $75 getting the wrong part, and a week of time.
Cheers,
b-z-