This has been a freaking battle. After 3 wheel alignments my car finally drives in a straight line (for the most part) and the high speed wandering side to side issue is gone.
But, right after my 3rd alignment when i was pulling out of the shop i hit a few bumps and i could feel the rear of my car shift to the right. Its almost like the rear wants to slide out. Its not consistent but i would say 50% of the time my car is going over a bump or a series of bumps it does it. It kind of feels like the rear of my car dips down a little bit and then shifts to the right.
Best I can really explain it. Someone on here that i was PMing (lost the PM's) said he had the same problem with his 04 and it was a bad alignment. something about the camber adjustment was done wrong??
I took it back to the shop but of course they could not replicate the problem.