Greetings! I am new to this site, but I have an 07 ES350 with roughly 250k miles on it. Under load there are hard vibration that resonate throughout the car. Myself and few of my mechanic friends think it may be the engine mounts that are on their way out, but I wanted to see if anyone else has this problem because I don't want to do that job and have it not be the fix as it is a massive job. I first thought it was the transmission failing as it only happens under load and when I take my foot off the gas it will go away, but the problem doesn't happen all the time, so that eliminated the transmission as the source. I asked Lexus when I was in there a few months back but they said they didn't feel or see anything (of course it wouldn't happen when they had it) wrong with it. If anyone has any ideas or had something similar happen, I would love to hear it. Thanks!