Hello all. My son has a 2011 Hyundai Genesis Coupe 3.8 Track. He told me he thinks he has a 'clunking' noise when accelerating from a stop. I've driven it myself and noticed this as well under standard acceleration - not hammering it at all. At first I was thinking U joint and after crawling underneath, I see this car doesn't have traditional U joints so that was ruled out pretty quick. To be honest, to me it seems a little more high pitched than a 'clunk' that I'm used to hearing with rear end problems. He sent me a screenshot of a post he found about missing differential mounts and it appears his LH rear differential mount bolt is missing. The RH is of a different design with the bolt running through a bushing set up in the frame. Not really sure how the LH should look, but the hole running through the frame is much smaller. Definitely nothing there now and looks like it may have been gone for a while. Part of me wonders if it's more of a 'slap' than a 'clunk' and if it could have to do with the servicing of the differential. BTW, we changed both rear axles and wheel hub assy's about month ago.
This is all new territory for me. I'm 52 and more of an old school car mechanic on old cars. I appreciate any advice or direction to go forward from here.
This is all new territory for me. I'm 52 and more of an old school car mechanic on old cars. I appreciate any advice or direction to go forward from here.