I lifted my jeep with 3"blocks in the back and coil springs in the front. I'm having some grinding going down the road and alittle when I mash the brakes. Does anyone know what's causing the grinding? My brake lines are fine and there's no sign of grinding underneath.

 

Check your drive shaft u joint at the slip yoke of the t case for binding. Also, this belongs in modified tech because a lift is not oem