Re: Brake Squeal only when backing up at idle...
FIgured out what it was...when I did my spring install, I removed the axle nut to drop the spindle some more. Apparently when I re-seated it, the "teflon" washer between the backside of the spindle and the CV axle didn't seat all the way properly and was causing the squeak. I lubed it up with some grease and made sure it was sitting good and now no more noise.
2015 WK2 SRT - Billet Silver
Previous Jeeps - '12 WK2 Overland, '99 WJ, '96 ZJ, '93 ZJ (Caged & locked on 35s)