Grabbing this one if needed.
If you are upgrading from a 3.0 or 5.0 radio to an 8.4 (13-17 Harmon or Panasonic. Not sure if anyone has confirmed the 8.4 conversion on an 18 truck), here's a link to the 8.4 conversion thread for details (start at post 2 & 3)...
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DIY: 2013+ RA3/RA4 8.4" Radio Conversion Upgrade.
------------------ 4/25/18 edit ------------------
Just an 'issue' update for those installing the UAQ/UAS radio in their truck...
We have a few reports:
See: Gibbs' .
HVAC Issues w/UAS upgrade
A lack of 'full' heat after radio install using the previously recommended 13-17 HVAC modules from the earlier Ra3/Ra4 upgrade method. (Blend door not making full travel)
- Guido2112 's 17 1500 (fixed w/new module)
- Gibbs ' 18 2500 (fixed w/new 18 module)
** Ckleinfeld 's 15 1500 (used mod. didn't work). .
See here
We can't confirm 100% yet until more people report back but we have identified the correct 18 HVAC modules ...
Code:
As DeereGuy stated, it appears that on 2018 trucks ...
- 68366552AA = 1500 trucks w/8.4 radios (MTC & ATC)
ie factory 7 speed fan (w/Variable Displacement A/C Compressor)
- 68366553AA = 2500/3500 trucks w/8.4 radios (ATC)
ie factory 4 speed fan (w/Sgl speed A/C Compressor)
Cost for each is in the $120-$130 range.
Also:
Here's how Sawz fixed the 2018 USB hub cutout issue on his earlier console.
See here.
M² Mods.