Have the same clicking noise, Torqued the castle nut to 80lbs and regreased everything from the a-arms to the wheels, and still had a clicking noise. Went back thru and had a lot of play at the wheels. The wheel bearings were shot, waiting for parts, keep ya posted if that stopped the noise. Just turned 400 miles (90% of miles rough XC riding)
Thanks for all the good info!