FJ80fornow

I have a 5.7 Hemi installed, and am putting in a new power steering pump as the other one was whining. Question: The Power Steering pump is the one AEV identifies as the correct part, which is a part from an 07WK SRT8, and Jeep recommends using Hydraulic fluid (power steering fluid) in this particular pump. The Steering gear in the JK is the stock steering gear, and Jeep recommends the use of ATF4+ fluid (Automatic Transmission Fluid), which is what the original JK power steering pump used. Soooooo, which is it? Which fluid works with both parts? I don't want this new pump to whine like the old one.

derby911

From My experience power steering fluid will work in a system that calls for atf but atf won't work in a system that calls for power steering fluid so I would use power steering fluid

eDiveBuddy

Mine says Mopar Power Steering Fluid +4

FJ80fornow

your power steering pump says "power steering fluid +4"?, or your steering gear? which power steering pump did you put on your Hemi?

FJ80fornow

I appreciate this...if I can confirm that this is accurate (not doubting you, but just want to make sure), then this is the direction I'll go. At $250 per pump, and the time it takes to replace it, I want to get it right this time.

Thanks for the input.

eDiveBuddy

Did I write that? Man my brain is fried. My bottle says power steering fluid +4. Same pump and gear as yours. I got the fluid from the dealer as I too did not know what to use when my first pump went TU. When this one goes it's a PSC for me.

FJ80fornow

That is the direction I think I am ultimately going as well, but I'm not too sure about having steering that does not come back to center when driving on the road. As for your current configuration (using the mopar power steering fluid), how is it working? Does your steering whine and feel like it is working hard? I also have 37's, so this doesn't help, but I know plenty of stock engine guys on 35's that have steering that feels pretty good. My castor and everything else is in line, so it's not like I'm fighting against my suspension.

eDiveBuddy

It does whine a little, but it does not feel bad at all. But, I do only have 33's.

FJ80fornow

......and they said they use the Automatic Transmission fluid (ATF+4) in all of their conversions. I am still a bit skeptical, as this is the fluid I used the first time, and the pump whined from the start. Either I had a bad pump, or this fluid is not the best solution for this set-up? I have a Chrysler Mechanic checking into it to see if there is any word from Chrysler as to the ATF+4 being harmful to that particular steering pump (which calls for the power steering fluid).

therza

When I did mine, I asked Dave at AEV about this and he said to use the ATF+4 fluid. It did make me wonder how that was going to affect the pump. If you switch are you going to bleed the system somehow??