popping

2014 Jku sport. Manual transmission a little over 50k miles. Problem location is rear driver's side wheel. Recently started making a popping /clicking noise when in reverse and a slight scraping noise when moving forward. There is a little bit of dark oil so I know the axle seal is at least bad...

Every time I try to play my music from my BT my speakers will pop every few seconds then go silent for a second then come back on. It does this every few seconds. When I turn on my FM/AM radio the volume is set at 0 and won't turn up. Does anyone know how to fix this? Does this mean my speakers...