I heard one other guy with this same problem. His was solved by taking the rear wheels off and really cleaning the mating surfaces with brake cleaner and torqueing them the right amount. I know sounds too simple but it worked!I have a 2015 Z51 M7 with around 24k miles on it that I ordered new and am only driver of car. It just recently developed a clicking noise that only seems to occur under the following conditions.
1 - Fully warmed up
2 - Not under power (ie coasting)
3 - Around 35 to 40 mph in 3rd gear (It may have also occurred in fourth, but I am not completely sure on that)
4 - Noise will immediately stop when clutch is depressed.
Sound is clearly coming from rear of car. Per other posts I changed the clutch fluid (ranger method) and replaced the rear differential fluid. The rear dif seemed to be low but not quite as dirty as what some are seeing. Sound still occurs after these changes.
Even under these conditions it doesn't always happen, it is sporadic. I have only heard it about 5 times now. The last time that I heard it I didn't push in clutch and recorded the attached video (if I can figure out how to attach). After putting in clutch it seems to not immediately return. I have stopped driving to prevent any further damage. I am not able to save the video due to 3.4 Mb Zip size. Any ideas to attach video are appreciated
The sound is a periodic clicking sound like a baseball card in the spokes of a bike. You will noticed a sudden increase in frequency near end of video. I am hoping to get some ideas to take to dealer before they tear everything up. I just went past 3 year mark. but this should fall under drive train and should still be covered. Thanks for everyone's help, I really want to get my baby back on the road again soon.