I checked my driveshafts also and surprise, I found grease leaks at both of them, the inner side and the short one is making clank-clank noises when I release the clutch after changing the gear. Funny, I had this noise but not so loud like now, since I bought the car last year, 10.000 miles ago and now its getting louder and louder. Tried to find the Tutela MRM Zero in my area with no success tho. I'm wondering if the regular Lithium/Graphite one works for the inner joint. I inspected the rubbers on both and they seem fine, probably the collars got loose, seems like a common problem, since we all got this issue.