i have a loud grinding noise coming from my front left tire just replaced the brakes and whatnot then i heard this noise like metal grinding idk thoe. im sure the bearing is toast. is it a fairly easy thing to replace? was kinda looking it up online and there saying i need air tools to get the axel bolt off? idk how long its been bad for and dont want the wheel to snap off on me and im sure a shop will charge me 3-4 hundred bucks but would rather do it myself so any help or pointers would be greatful