when in park, neutral and reverse, engine runs smooth. When I shift into Drive, I get violent lurching/bucking until engine stalls and quits.

What is your question?

Just changed alternator, before that, no problems (except alternator) when in park, neutral and reverse, engine runs smooth. When I shift into Drive, I get violent lurching/bucking until engine stalls and quits. I got no check engine or warning lights and FIXD showed no code or problems Other than bucking and jerking, no noises or leaks. 240,000 miles, going for 300,000

How long has your 2007 Chrysler Pacifica had this problem?

About 10 miles down the road after replacing alternator