What oil do i put in my power steering on s/reg grand cherokee

That is strange because they are unrelated.

The power steering works using a pump that has a pulley and is turned by the Serpentine belt. Where you put the fluid, did it look like this?

https://www.carparts.com/power-steering-pump/jeep/grand-cherokee/2003

https://www.google.com/search?q=2003+jeep+grand+cherokee+power+steering+pump

The Brake Master Cylinder has a similar reservoir and also has a brake booster that uses vacuum power from the engine to give you a mechanical advantage. Both are shown here

https://www.ebay.com/b/Brake-Master-Cylinders-Parts-for-Jeep-Grand-Cherokee-for-2003/33566/bn_87327012

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power steering pump starting going bad

Could be low on oil, or need a shot of additive if it is a limited slip differential.
The noise may be the clutches in the diff or one of the axle bearings.

sound like lack of lubrication at the steering joints, your ball joints need greasing and make sure you bleed power steering system, check power steering fluid level.if low more like power steering system full of air need bleeding.

First of all we need to know if the vehicle is automatic or manuel? if its automatic then you can ad oil through the ****** dip stick hole and if the vehicle is manuel gears then there is diffrent oil and a diffrent place to put the oil in. Donot put gear oil in power steering.

What fluid are you tryin to put in?

You have probably blown a power steering hose. remove and replace.

Inferior hydraulic oil was used by the mechanic. So I drained the oil and replaced it with the right oil. Problem solved.

reg power steering fluid

The most common problem is a bad oil pressure switch on the 99-02 grand cherokee with the 4.7l v8. The part has failed on 90% of all 99-02 grand cherokees I have worked on. The housing is junk,but since it has lasted longer then 36,000 miles the factory would not issue a recall. The oil pressure switch can be purchased at any outlet. but have found the duralast was decent. that being said Go to autozone and get part # PS471 (oil pressure switch for 1999-2002 N code 4.7L V8.) chances are if you encounter the same problem after replacement you will need to drop the oil pan and un clog the oil sump.

To replace the switch, under the hood look for the power steering pump on the driver side of the vehicle, to the right and under the p/s pump is the oil pressure switch, If it is wet, its bad for sure, remember to disconnect the battery before service,as not to harm the gauges.