I will be curious what PNs he has for the various 18 trucks/trims. Still seems like a calibration/relearn but can't know without trying a few things one at time to eliminate them.
It's interesting that it works correctly (differently) with the 17 radio (minus the service cell error message you were getting), which verifies the 8.4 conversion harness and xxxx5017AE module are good imo (& DeereGuy). But the we are all essentially using a 13-17 module with the 18 radios. And the rest of us w/13-17 trucks & UAS or UAQ radio also have the Single zone ATC mod, and use the "Auto" temp function a lot.
- Mpgrimm2: 13Ram1500, 18 UAQ, Single Zone ATC mod/bezel (xxxx5017 module for 4spd)
- DeereGuy: 16Ram2500, 18 UAQ, Single Zone ATC mod (xxxx5017 module for 4spd)
- 00R/T: 13Ram1500, 18 UAQ, Single Zone ATC mod/bezel (xxxx5017 module for 4spd)
- Rick's Ram: 14Ram1500, 18 UAQ, Single Zone ATC mod/bezel (xxxx8186 module for 7spd)
- STecoD: 15Ram1500, 18 UAQ, Single Zone ATC mod/bezel (xxxx8186 module for 7spd)
Edit/updates:
- 61N150W: 14Ram1500, 18 UAS (CA), Single Zone MTC, w/ xxxx8186 = No issues !?!
- Gibbs: 18Ram2500, 18 UAS, Single Zone MTC (issues w/ xxxx5017 fixed w/2018 68366553AA module)
- Guido2112: 17Ram1500, 18 UAS, single Zone MTC, (issues w/ xxxx8186 fixed w/2018 68366552AA module)
- ckleinfeld: 15ram1500, 18 UAQ, Single Zone MTC, (issues w/ xxxx8186 & 2018 68366552AA module. Fixed w/Sgl Zone ATC mod)
- jdip: 14Ram1500, 18 UAQ, Single Zone MTC, (issues w/ 68183973ab [alt for 8186] & 2018 68366552AA module. Other issues with radio v21.9)
http://www.ramforum.com/index.php?posts/1458159]M² Mods.