Just yesterday I replaced the rotors and pads on the front wheels of my 2004 Tacoma Dbl-Cab Prerunner. While doing this work I noticed on the passenger side that there was a lot of grease buildup and brake dust collected behind the axle hub. Also, the hub required a little more pressure to rotate it compared to the driver side. I should have taken some pictures to show you guys but do you guys know if this could be a problem with the wheel bearings? It did not seem like there was play in the axle hub. Any thoughts?