Scraping pulse noise r front merc sable

if you have mis-matched tires on your car fix that FIRST.

then re-analyze your problems then and only then.

if you have already taken care of this then you say a thumping and not a pulsating feel ???

most likely a front hub [wheel bearing ]going bad but jack up front side that is causing problem and try to move tire in and out with hands at top and bottom of tire and listen and feel for noise or excess movement it to much movement remove tire an check the upper and lower ball joints as well as the shock/strut but check brakes grinding can also mean pads are metal to rotor but usually grinding and thumping is related to a bad hub

Grinding noise, growling noise, thumping noise? Something else? If it's a grinding noise, more than likely it is during stops. In this case it is probably metal on metal in the brake pads. If it is a growling it can be in the wheel bearing or CV shaft which usually gets louder with turning or banking. Is it is a thumping can be from a tire issue, a strut, a sway bar link banging around etc. Need to clarify the noise and how you are hearing it.

first, check your brake pads, the grinding starts when the pad is worn to the rivets that hold it, then the pad starts to crack and break away. once the pad is gone there will be play that allows whats left of the pad to move around.. causing the thump, there should also be some change under braking, like going from a thump to a grind

this could also be wheel bearings.. but my guess would be the pads, and if it got to that point.. i would bet that the rotor is shot as well

sounds like wheel bearings-1st
but hopefully your front disc need turning, or replaced.
check wheel bearings by jacking up the front end "CAREFULLY" WITH
JACK STANDS & wiggle tires,if you get more than a 1/4'' slack on 1 or the other, than it's shot. Best to replace both sides. "GOOD LUCK'' &
BE CAREFULL.

The front calipers are not the problem...did a shop replace the pads and rotors? Or did a friend replace these parts. The Chrysler front pads and rotors are an excellent design...easy to service and replace parts...only 2 bolts hold on each caliper, and the rotor is held in place with the caliper, and wheel. My first thought was a front wheel bearing is grinding, but you should have noticed this before the brake parts change. The pads could be installed backwards also...my second thought was you may have a loose wheel or two...retighten all 5 lug nuts by using the "star" tightening method, you may be surprised that the loose lug nuts are the only problem. Hope this helps.

It sounds like the brake pads are metal to metal, when you turn the flexing of the wheel makes them touch the rotor and grind. This can rarely be caused by a badly worn wheel bearing as well, have both brakes and wheel bearing inspected.

i would 1st check out the front tires to make sure that they are not defective, if tires check out ok, then i would put the jeep on a rack at a garage, and check out all of the front end components, including c. v. joints and the wheel bearings.

There are a couple of things to cause metallic sounds when turning. First thing, is if it's a clicking sound when you turn, then you have a cv joint going bad. It's usually more prominent when moving in reverse, however it can happen just as well while moving forewards. Secondly, if it's more of a grinding or scraping noise, we have a couple of options. The sound could be coming from the brakes, if they're worn or have grit stuck in them, or it could be bad bearings in the front wheel hub. The wheel hub has a tendency to making a whining noise when driving; usually most easily heard when driving past buildings. They can also allow the tire/wheel to present the appearance of leaning when looking at it. If bad enough, it can even rub on the brake caliper, or cause the disc brake rotor to wear out the brake pads prematurely. So, to recap: Check:
CV joints, if a clicking sound brakes or wheel hub bearings if grinding or whining sound.

try to replace the wheel bearings.