UPDATE:

well I changed the diff oil. sound is still there. So now it pretty much only leaves the bearing as the cause.

some notes on changing the diff oil:

- I needed a 14mm hex socket. I don't know about you but I didn't have one, so it took a little bit of driving to find one. I guess those larger sizes are not that popular.

- gear oil stinks. like dead-animal stinks. yuk.

- having some kind of pump that attaches to the new-oil bottle would have saved tons of time and oil that will find its way on you.


Time to order that bearing.