I have a 01 WJ V8 4.7L and my power steering intermittently makes this god awful moan. It usually happens if they A/C/defrost is on when idling. My pump is working fine, power steering has no damage or wear (I keep up on it), and I change the fluid to keep it fresh (yes, using the exact recommended fluid) but it still moans sometimes and the past several years the moaning is getting worse. Since it is an '01, I'm thinking it wouldn't hurt to replace components. My power steering high line does have slight evidence of leaking, however, I have never had a problem with low power steering fluid before. I do feel the lines may be the culprit making the noise and I am thinking of replacing them. And yes, I understand it is a Jeep and Jeeps just decide to make weird noises for no reason and then go away.
Since this is a vital part, I don't want to buy aftermarket and go with MOPAR. Are there any concerns I should consider with a new hose with a 12 year old power steering pump? Should I order any other parts while I am at it? On justforjeeps.com, I only see the "hydraulic power steering hose" (part # 5019708AE) which I am assuming it is the high hose? Does anyone know the part # for the low pressure (to gear from hydraulic fan motor I believe)?