Mopar and Chrysler have always had their fluids described as meeting "MS" standing for "material specification" I think and the one for the P/S fluid required if you have the hydraulic cooling fan (Hemi & CRD) is MS 10838. To my knowledge this fluid was discontinued by Mopar and they now say to use ATF+4. However, when these vehicles came out, they advised against any AFT in this system, including AFT+4. However, both Lubeguard and Ravenol make fluids that meet the MS 10838 spec. I would try to use one of them if you can source it in your location.
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