When driving 2 days ago my front end didn't want to move, left vehicle in drive and got out of truck back tires spinning front end didn't want to move. I put it in reverse and drove a little and hit the brakes seemed to break free from whatever was holding it back. Now today did same thing, got out of vehicle smelled something burning...could it be front brakes or front diff?? Front diff 2 months ago had 2 fifty-cent size drops under it one day and that was it. Not leaking fluids of any sort that I can see. Air in brake lines causing them to seize? Replace bakes and rotors 1 1/2 yrs ago
Thanks

 

a year and a half ago???

a good idea is to check your brakes every 6 months

sounds like your pads are down to metal

 

I'm still confused why they would be locking up randomly though

 

probably cause your pads trying to weld themselves to the rotors