I am unclear if a dealer will perform a TSB unless there is actual fault they can reproduce or diagnose.
They won't. A TSB isn't an actionable item until there's a bona fide fault.
If you don't have an OBD2 go to AZ and see if they can pull up any pending faults.
It would be nice to know if your O2's are still in closed loop when this happens. In closed loop you're running rich, maybe the rich air/fuel is causing a stall?? With an OBD2 you could monitor such things in real time.
Just a hunch...idle control maybe? At cold startup you're idling high then you put it into gear and the rpms drop too low, momentarily, causing it to almost stall out??.. check out the rpms change from P to D when cold...is it dipping well below 600 rpms for a moment?