I think the Hemi just had the hydrualically driven fan, the 4.7L V8 did NOT. If I'm wrong, I'm sure some one that knows will chime in and correct me. If you have the hydrualically driven fan, I "believe" that is a huge load on the PS system, I think it would be wise to drain and replace the PS fluid if you have that system, and only use the recommended fluid in the owners manual, which is only available from the dealer. Make sure it is the MS18083 (might be off) by spec, do NOT accept the MS9307 (again might be off on the number) that some dealers have given WK/XK owners asking for PS fluid for their vehicles.
Even if you do NOT have the PS driven fan, replacing the PS fluid and brake fluid can keep those system performing better and remaining more trouble free longer. No you don't have to do it right away, but sometime in the future would be good.
The anti-freeze, check your O.M., it likely states it is good for 5year or 100k miles, which ever occurs first. If the original owner didn't replace it, and sounds like he didn't, you're 3 years overdue on replacing the anti-freeze. Again, use what the OM says, Chrysler HOAT fluid, either buy it from the dealer or use the only aftermarket equivalent, Zerex G-05. Do NOT use the universal, all makes, all models, mixes with any color anti-freezes, they are anything but and are bad news.
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