My 2006 v6 mustang(pony pkg) has a really weird idle. It gives my car a little shake randomly when my car idles. Ive had mechanics tell me a WIDE array of problems it "could be" from a leaky seal valve to transmission needed to be flushed. I went ahead a flushed my transmission since it had the miles to do so, but I cant say it fixed the issue. Any other owners have this problem?