4 years ago I had a shop install new Bilstein shocks, struts, new control arm bushings, and a used k frame because he said mine had a problem; can't remember exactly what it was, something about bolt holes becoming elongated. Since then, ONLY during the summer when it's hot outside, at slower speeds while making a turn, particularly to the left, I hear a distinct clunk in the suspension. It appears that during torque, turning, and movement, something is shifting, and then when I turn left it clunks back into place. I'm convinced this is a bushing issue, as it does not do this during the winter when it's cold out. I've checked all the bolts and they are tight. I'm wondering if it's the rear subframe bushings? I can buy a new JP Dansk subframe for $149. Are they any good? It seems like there are a lot of problems with the hidden nuts in them for the control arms, so maybe it's worth getting a new one? I hate just throwing parts at something but not sure exactly how to trouble shoot this. I have a 2005 Mk4 Jetta wagon with 309,000 miles on it.