What that sound back there?

So towards the end of the practice on Saturday, Stephen mentioned that there was a different sound coming from the rear of the car. We couldn't quite put our finger on exactly what it was so I marked it on my list of things to do...Race day passed and I don't remember any sounds but maybe thats because our exhaust is so loud that you would have to be off the throttle to hear any noises. So since we usually are punishing the little pedal on the right I didn't hear anything. However on the way how there was a weird rubbing like noise coming from the rear of the car but I thought maybe it was the 6 tires in the car. I got home and inspected and nothing was rubbing. I emptied the car and drove around the block and isolated the sound on left wiggles and silence on right wiggles. Definitely a bearing!!! so here we go back on the wrench horse. Time to put the gloves on and fix this thing...