So the other day I was driving to work and as I was nearing a stoplight, I started to downshift. All was fine until I got to First gear and I heard a "thump." My Auto hub on my driver side locked in randomly, so I pulled into a gas station and reversed to disengage the hub. It didnt act up again until today doing the same thing. Just curious if anybody else has had this happen, and what could cause that. I would like to upgrade to manual hubs, but only when I get the funds, so in the meantime I would like to fix this. Any help would be appreciated. P.S. I searched and didnt see anything about this occuring.