Brake Pedal shimmy
 

08 XLT 4x4 Had a rotor slid freeze up last fall and eat a rotor. 39000 miles. Took apart and cleaned up and lubed, new pads and rotors both fronts. Now have pulsating pedal at 48000. Do you think the rear might need attention now or still the front? I never use the E brake.

Well usually at about 50k the brakes are ready to be worked on so that is where I would start. I also recommend using the e-brake once in a while just so it doesn't freeze up on you.

Replace your rear rotors. I had my front rotors and pads replaced and still felt the pulsating pedal. I replaced the rear rotors and pads and all was good.