brakes pads... all around.
Advance auto has wagners that have a one time replacement on commercial trucks 55 for the front 45 for the rear last about two years driving 15k a year 11 of which is towing 7k 75 properties a season and the rest is plowing.
When i rotate my tires i check my brakes and grease the pins every other time using permatex extreme brake lube.
This particular truck is an 03 f250 ext cab long bed 4x4 with 7.3
Do it better than the last Guy!