Rear End Clunk
I had the same problem with my new 04 Heritage, not even 3000KMS on it and the rear seemed to 'slip'. I really noticed it when I went from rev to fwd, it would seem to go slow, then clunk, it would engage then go.
I got so many excuses from the dealer, from "..it's a locker type diff and that's what it does..", to, "..let the gears wear a little then it'll go away..". I took it in 5 times and got nothing. I finally took it to another dealership and was told that there was a problem with the clutch packs for the limited slip, had it fixed in less than 3 hours.
My 01 F150 had a problem with burning out pinion bearings, went through 3 of them in 60000KMS, real pain in the butt, the last time it happened I had to fight with the dealer to make them pay for it, even after it was off warranty. They had just replaced the bearing not even 1 year before and it went again, but I was over the 60000! after many days of complaining I only had to pay about $200 of the whole $1000 it cost, because on the last blown bearing it toasted the whole gearset, so all the internals had to be replaced..