Well, those are all transmission codes. Basically, pressure in the transmission isn't correct and it's causing issues. Likely it is the reason for the stalling. I would start it and let it run a bit, then erase the codes and cycle through the gears again to see which ones come back.
The 846 (circuit B) and 871 (circuit A) are both pressure sensor circuit codes, the 732 is incorrect gear ratio, which basically means the PCM is seeing that the transmission is in a gear, but the output of the transmission isn't moving.
I doubt it's the new pack. It sounds more like something in the wiring, like corrosion or a pinched wire.
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Tuesday, May 17th, 2022 AT 8:43 PM