Low charge when hot.

LivewireBlanco said

So it's fairly normal to have this issue when it's hot and not when it's being driven and cool? Everything works fine and charges great until extreme stop and go diving. The alternator is about a year old and is 70 amp I believe. The voltage regulator is original.

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It's entirely possible it is normal, since a lot of times when engines heat up to about the max temp they run, they idle down a hair, causing the alternator to not put out its normal crappy output. Idle "AIN'T" the time Chrysler's stock charging system shines.....and I don't really know when is......lol........but that could be the issue. Where is your hot idle speed?