GSquicksilver

my 93 ls400 has this weird issue. it is most noticeable if the AC is on. after i drive and then come to a stop so i can park my car, i shift from D to park. right when it gets to park, the car shutters a bit where the rpm drops a tad bit for a second and then everything is back to normal. anybody else have this issue?

GA400

Mine starting doing this right before the battery went out last summer. Next symptom was a sharp clicking before it would turn over when starting. New battery fixed both problems and they have not reappeared