RE: dodge stalling when put in gear
Any chance the engine idle needs to be turned up a bit? Grand Ch's take the same tranny as a half ton Ram? No sugar, I didn't know. Do the Durangos or Dakotas have them too?
If it is the PCM, unhook the battery cables, and then turn something on like the 4 way flashers. It will force the electrical system to dump any capacitance. Then reconnect the battery making sure the connections are as clean as possible. See if that makes any difference. Make sure the tranny wiring harnesses are plugged in completely. Sometimes a tab breaks off from prior service, and the wiring works itself loose.
And are you getting any codes? Like 37 maybe?
Good luck with your ride.