2002 Ford Expedition XLT v8 4.6. Recent had to replace wheel axle do to running up a curb. After the axle was fixed I drove the car for about 15 minutes and it smelt like something was burning the rim was extremely hot to touch and I did notice a grinding sound like metal grinding metal while driving and braking. Didn't have this issue prior to the accident. I tried replacing the caliper and learned that was not the fix. Can someone help me out on what could be the fix
This sounds to me like the either the brakes, or the wheel bearings weren't installed properly (wrong size or not greased?)
I'm assuming from the comments about the parking brake that it's a rear wheel. Chock the front wheels, and jack up the back. Support it on axle stands. Release the parking brake, and try to turn the wheel by hand - I suspect it will be very hard (compare with the one on the other side which should spin freely).
Remove the wheel, and visually check that the parking brake has released (again, compare with the other side to see what it should look like) - if that's stuck on then you've got your culprit.
If not, check to see if the service brake is still 'on' - are the pads still tightly gripping the disc? Check the flexi-hose for any sign of bulging or damage (which can make it become a one-way valve and prevent the brakes from releasing).
If there's no sign of problems with the caliper, remove it and try turning the hub by hand - It should spin very freely by hand. if you still can't turn it, then it must be the wheel bearings.