The motor mounts were replaced a few months ago, and when I replaced the thrust links around the same time I figured it would cure the problem. Obviously not. :-) That does remind me, the mechanic did mention that another of the links in the rear could be causing the problem but they couldn't check it (they don't have a wheel lift, so they can't check the suspension under load), so he referred me to the alignment place. They didn't find anything, but are there other links that could be causing this?