Why does my jeep creak when i go over bumps and break

SOURCE: front end of my 87 jeep cherokee shakes bad when i hit a bump

May check your ball joints and tie rods. Also could be your shocks.
Does it seem like its more shaking on the left or right? or even?

SOURCE: 2004 jeep gran cherokee front end clunk

you must replace and lube the front sway bar bushings,chrysler service bulletin calls it a squak, but can sound like a rubbing, a clunk etc the common factor is this is really noticeable the colder it gets outside

SOURCE: 2000 Jeep Grand Cherokee Creaks over bumps

Just start at the front and lube every thing that has a lube fitting. Make sure that you lube all the drive lines. this should stop your creaks.

SOURCE: The front end shakes badly when going over a bump

That and other bushings and idler arms worn. I would suggest a free inspection somewhere for them to show you what needs repaired.

SOURCE: "Creaking noise from front right side of jeep"every time hit bump

If it is new take it back to the dealler for warranty repair. No new vehicle should have any noises . seriously, take it back for repair.