My 10 bolt has some pinion bearing howl in it. Not noticeable with the windows down but now that the temps are climbing it's A/C time. Anything I can put in it to hush it up some? Thicker lube, additives? A guy I work with said put sawdust in it but I'm not to keen on that idea. I am going to get a 14 bolt this fall but until then any ideas? I would just turn up the tunes but the stock radio isn't the greatest.