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  Topic Review (Newest First)
12-28-2010 09:04 AM
tcar Look in the glovebox manual for YOUR Jeep. It will tell you EXACTLY what to use.

Do not use anything else.

Don't use Lucas or any other unless it says on the bottle that it meets exactly what your manual says. Period.
12-27-2010 07:36 PM
autoposer
Quote:
Originally Posted by BFI View Post
thats odd (maybe its not), but still what makes a system so special to need a specific fluid? I can undestand by the way of oil viscosity and such across different parts and models, but specific to 1 product number? Maybe ive understood this wrong but it just seems a bit strange. Im sorry if my question is too retarded to bother answering.
I've been wondering the same thing. I recently replace my PS fluid with off the shelf fluid in my 99 Grand Cherokee 4.7L and after a few hundred miles it started to make some noise. It still performs just fine so I'm not sure if I permanently damaged the pump yet. The pump looks identical to the one in my 2000 XJ which doesn't require any special fluid.
06-27-2008 10:30 AM
rm2001wj Actually, it's the 2001+ WJs with the 4.7 that have hydraulic fans. But, the MS5931 is "required" for all WJs.

Since all hydraulic systems are not all the same, it should be not be too surprising that different hydraulic fluids are required. Maybe a good example would be automatic transmissions: Ford -- Mercon (AFT), GM -- Dexron (AFT), Chrysler -- AFT+4.
06-27-2008 10:01 AM
Windowsrookie
Quote:
Originally Posted by JayJEEPguy View Post
The 4.7L WJ uses a hydraulic fan that is also run off of the power steering pump. Regular power steering fluid is not the same stuff.
Only 2002+ Uses a Hydraulic fan, my 2000 uses a mechanical fan.
06-27-2008 06:43 AM
JayJEEPguy
Quote:
Originally Posted by BFI View Post
thats odd (maybe its not), but still what makes a system so special to need a specific fluid? I can undestand by the way of oil viscosity and such across different parts and models, but specific to 1 product number? Maybe ive understood this wrong but it just seems a bit strange. Im sorry if my question is too retarded to bother answering.

The 4.7L WJ uses a hydraulic fan that is also run off of the power steering pump. Regular power steering fluid is not the same stuff.

Original poster: if you have the part number for the fluid you want to purchase, go back & return the fluid you bought and politely ask for the fluid you wanted. I went through the same thing last time I changed out the power steering fluid.
06-26-2008 10:12 PM
BFI
Quote:
Originally Posted by Windowsrookie View Post
Most of the newer vehicles use Transmission fluid.
thats odd (maybe its not), but still what makes a system so special to need a specific fluid? I can undestand by the way of oil viscosity and such across different parts and models, but specific to 1 product number? Maybe ive understood this wrong but it just seems a bit strange. Im sorry if my question is too retarded to bother answering.
06-26-2008 10:01 PM
Windowsrookie
Quote:
Originally Posted by BFI View Post
How come its so special you have to get a specific fluid? Why doesnt a convential fluid work? Sorry Im a Numpty too.
WJ Grand Cherokees are the ones that use the conventional Power Steering fluid. Most of the newer vehicles use Transmission fluid.
06-26-2008 09:51 PM
BFI How come its so special you have to get a specific fluid? Why doesnt a convential fluid work? Sorry Im a Numpty too.
06-26-2008 09:34 PM
nashmd454 I like Lucas power steering fluid along with their other fluids,
06-26-2008 09:31 PM
jeepheller98 hmmm on this note i think im changing my sisters PS fluid tommrow........................................... ...............................oops
06-26-2008 07:00 PM
rm2001wj
Quote:
Originally Posted by Windowsrookie View Post
But It's not, there's a TSB that specifically says not to use Mopar Power Steering +4.

The TSB refers to AFT+4, and if Mopar Power Steering +4 = AFT+4, you would be correct. If it is not clear that they are the same, then he needs to look for the MC5931 certification.

I got the point that you are certain that MPS+4 and AFT+4 are the same. Let some of us express a little doubt, and then find some way to be certain about the proper fluid.
06-26-2008 06:03 PM
Windowsrookie
Quote:
Originally Posted by rm2001wj View Post
You may be right, but the product he got, "Mopar Power Steering Fluid +4," could be a new product which supersedes the original PS fluid. That's why I suggested that he check the label for MS5931.
But It's not, there's a TSB that specifically says not to use Mopar Power Steering +4.

06-26-2008 05:53 PM
rm2001wj
Quote:
Originally Posted by Windowsrookie View Post
The fluid he purchased will not work. It's basically ATF+4.
You may be right, but the product he got, "Mopar Power Steering Fluid +4," could be a new product which supersedes the original PS fluid. That's why I suggested that he check the label for MS5931.
06-26-2008 04:52 PM
Windowsrookie
Quote:
Originally Posted by rm2001wj View Post
Check the label to see it it meets the MS5931 standard. If it's not mentioned, take it back for a refund.
The fluid he purchased will not work. It's basically ATF+4.
06-26-2008 04:27 PM
rm2001wj Check the label to see it it meets the MS5931 standard. If it's not mentioned, take it back for a refund.
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