Last time I was turning off the beach in 4x4 I could hear what I thought was the L/H birfield clicking, so today I removed it and it seems fine? I have been using the H/D AVM locking hubs that came with the Marks Adapters free wheeling kit that I installed a few years ago, could it have been these clicking? or perhaps it was the other side and the sound transferred. I have ordered a set of Aisin hubs to go back on.