04FreedomforJ

I’m really confused and maybe someone out there can educate me. The manual for my 2004 Grand Cherokee Freedom edition
says to use MS-5931 power steering fluid. I’ve looked at quite a bit of info on the web, spoke with dealers (who also seem a bit confused about this), looked in the forums and still don’t seem to have a good answer other than some saying MS-9602 now supercedes the MS-5931. My concern is that many of the forums say you shouldn’t use the 9602 to top off or add to the 5931.
So should the current MS-5931 fluid be drained (if so how) and then refilled with the 9602? I would appreciate your help as there doesn’t seem to be any sort of clear answer to this that I’ve been able to find. J

dave1123

First of all, welcome to CF!

That's a good question and also a confusing one. I see from your signature block, you have the 4.7. If it also has the hydraulic cooling fan, you'll need MS-10838 which is a special hydraulic fluid. My '00 4.0 is supposed to take MS-5931 but the dealer tells me it's been superseded by MS-9602. He gave me his last 2 quarts of the 5931 just to get it out of his inventory. I changed mine by sucking out the reservoir several times and refilling it. I didn't want to get any air in the system. What was in it, I don't know because it was black! Now my pump is whining but only when turning the wheels when stopped. Some of the XJ guys say they use ATF+4.

SO, to rap it up, I haven't gotten an answer myself. My dealer's parts manager searched his computer for a while and found mine was supposed to use the MS-5931. He said later years used MS-9602. It's all a freaking mystery and nobody seems to be willing to take responsibility.

kgm

It doesn't really do THAT much, so I just drained and filled mine with Advanced Auto "MOPAR Steering fluid" It was clear mineral oil. I did the same by sucking the res empty repeatedly over a few months. It's pretty clear now. 171K on a 99 XJ.

dave1123

When I really looked at mine it was black! It's hard to tell because the tank and dipstick are black and until I wiped it off on a paper towel, I didn't see it was black. Whatever was in it was working fine, just discolored. Now, the pump moans when you crank the wheels when you're stopped. All I was trying to do was make it last as long as possible. I guess my dad was right. "If it ain't broke, don't fix it!"

Prairieflyer

Hi!
I am new to this site. My issue is I own a 2004 Jeep Grand Cherokee 4.7L. I had a power steering leak and am now trying to figure out what ps fluid to put as for 1999-2004 models my remaining bottle says ms-5931. Unfortunatley, being in Sri Lanka this Mopar fluid is not available as heard its been discontinued some time ago. Some say to use ATF+4 but heard it is not advisable to use in this vehicle due hydraulic fan and it can ruin the pump. I cannot get a OEM for ms-5931 either here. I am not sure what Jeep is using for older models as too ms-6902 is for newer models. I have seen Mopar Power Steering Fluid +4 but not sure if this can be used on my vehicle. Any ideas out there? Thanks.

Prairieflyer

Hi!
I am new to this site. My issue is I own a 2004 Jeep Grand Cherokee 4.7L. I had a power steering leak and am now trying to figure out what ps fluid to put as for 1999-2004 models my remaining bottle says ms-5931. Unfortunatley, being in Sri Lanka this Mopar fluid is not available as heard its been discontinued some time ago. Some say to use ATF+4 but heard it is not advisable to use in this vehicle due hydraulic fan and it can ruin the pump. I cannot get a OEM for ms-5931 either here. I am not sure what Jeep is using for older models as too ms-6902 is for newer models. I have seen Mopar Power Steering Fluid +4 but not sure if this can be used on my vehicle. Any ideas out there? Thanks.