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the belt will make a screeching noise for the power steering if it is loose or worn out. check out the belt, or the power steering pump front bearings failed and will not let steering pump to spin. have a good day !!
Correct diagnosis, but make sure it isn't the left bearing. Jack the car up and check both wheels for play. If no play, start and put in drive (while still jacked up off both wheels), and listen to each side for the noise.
this is how you determine if the wheel bearing is the problem and which one it is, go some where you can make sweeping steep left and right turns, if the noise stops when you unload the wheels in either a left or right turn you have a wheel bearing noise, the bad bearing will be the one that is the unloaded wheel in the turn
More likely this is a wheel bearing or CV joint than suspension components.
One good indication is if, when your making a right turn or accelerating, there is a shudder or shaking in the steering wheel then its likely a wheel bearing.
Another good indicator can be found when you jack up the suspicious wheel. Put one hand on the top of the wheel and one on the bottom and pull back and forth. If the wheel makes a clunking noise and moves in either direction, then wheel bearing is shot.
It might be a faulty power steering pump. Try checking the level of the power steering fluid. It is probably best you have your power steering system checked by a mechanic.
Does the noise occur only when the vehicle is moving?
Try moving the steering wheel from side to side, while stationary (but don't do it too often, or you might damage something). If the noise is still present when the car is stationary, then it probably is the power steering system.
If the noise only occurs while the vehicle is moving, it could be a problem with the differential/final drive, or even wheel bearings.
Do you have a Grand Cherokee with full time all wheel drive? If so the viscous coupler in the transfer case could be at fault. They fail 100% of the time in those jeeps at around 100,000 miles + or -. In tight turns after the t-case warms up the Jeep will make an awful howling noise and the tires will usually chirp on pavement. The only fix is an updated viscous coupler or a new t-case.