Im glad I found this, I have the same problem but for a while now...over 3 months...lately since the weather has been getting warm and I have been putting my windows down the squeaky noise can be heard more and is very annoying. I am going to be looking at it within the week. I am 90% certain is has something to do with the rear driver side brake. Any suggestions before I start? I will be checking my springs and use some dw40 to lubricate the parts. I also noticed that the rear driver caliber has been under a significant amount of heat, since ive painted my calibers red and that one caliber is now black. I'm pretty sure this also happened after I had my 4.10 gears put in which does require the dis assembly of the rear calibers.