Psc fluid or ATF ? - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 11 Old 01-06-2019, 05:38 PM Thread Starter
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Psc fluid or ATF ?

So I'm upgrading my stock pump to the PSC pump and have been running ATF4 with the R N R set up. Do I need to flush and run PSCs recommended fluid or will the ATF4 be ok?

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post #2 of 11 Old 01-06-2019, 05:44 PM
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You can run whatever fluid you want. PSC recommends their fluid for the higher temp ratings and anti foaming additives.

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post #3 of 11 Old 01-06-2019, 05:56 PM
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Quote:
Originally Posted by rich6700 View Post
You can run whatever fluid you want. PSC recommends their fluid for the higher temp ratings and anti foaming additives.

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I am fairly certain as I just did the same pump that PSC wont warranty if ATF is used

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post #4 of 11 Old 01-06-2019, 06:02 PM
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Quote:
Originally Posted by stevenjoh1972 View Post
I am fairly certain as I just did the same pump that PSC wont warranty if ATF is used

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He didn't ask about warranty, he asked if it would work. PSC recommends right on their website that a flush should be done.

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post #5 of 11 Old 01-06-2019, 06:30 PM Thread Starter
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Quote:
Originally Posted by stevenjoh1972 View Post
I am fairly certain as I just did the same pump that PSC wont warranty if ATF is used

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What's a warranty?

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post #6 of 11 Old 01-06-2019, 08:18 PM
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You don't have to use the Swepco brand that PSC recommends. If you call and ask, PSC will tell you that you can also use GM power steering fluid. It is not ATF and is more of a clear / light gold color. Looks more like motor oil than ATF to the eye.

https://www.amazon.com/Genuine-GM-Fl.../dp/B00BK7MHOE

edit: You also won't need to flush the system if you start with all new parts. I did, for example. New pump, big bore and hoses.

Last edited by White13JKUR; 01-06-2019 at 08:21 PM.
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post #7 of 11 Old 01-06-2019, 08:21 PM Thread Starter
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Yeah that's the problem I have ATF in right now and I'm just changing the pump.
Quote:
Originally Posted by White13JKUR View Post
You don't have to use the Swepco brand that PSC recommends. If you call and ask, PSC will tell you that you can also use GM power steering fluid. It is not ATF and is moire of a clear / light gold color. Looks more like motor oil than ATF to the eye.

https://www.amazon.com/Genuine-GM-Fl.../dp/B00BK7MHOE

edit: You also won't need to flush the system if you start with all new parts. I did, for example. New pump, big bore and hoses.
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post #8 of 11 Old 01-07-2019, 05:16 AM
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Hey, Tap'
I ran that replacement PSC steering gear in my '11 after breaking 2 OEM steering gear , the last time being about 3 yrs ago. I ran it standard without assist , using factory pump etc that long but never used the swepco until I replaced resi, pump etc for upgrade to assisted. When I read everything initially, I just ordered the "flush kit" which was 5 qts of the swepco steering fluid & a big gallon of swepco flush oil ( mineral oil , basically) that cost a lot.
The flush fluid sits upon the shelf still; the amount of ATF+4 left in the system is so nominal that to have it introduced into the total amount of swepco or GM fluid you use is not a big issue. I could see if the stock ATF+4 were really contaminated or burnt it being less than desirable to mix but mine is fine. If you want , I'll sell you the swepco flush juice you'll find on the PSC site for 25% of whatever they charge but trust me , you'll be ok & shouldn't need to flush. Just use the swepco fluid.
I believe that , because over a long period of time , ATF+4 de-elasticizes the orings in the PSC components. I dunno who knows how long that takes but that seems to be the reason for suggested flush . I saw others online just pour swrpco in w/out flushing and they were fine so I did . It's fine.



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post #9 of 11 Old 01-08-2019, 08:58 AM
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Perfect timing to run across this post! I've been wondering the same myself. I had the Redneck Ram from West Texas Offroad installed back in September. I ran across a used PSC pump, reservoir, and 12" Derale cooler over a year ago on Pirate for around $300. I knew I would be using the cooler for sure, and could sell it if I never used it. There has been just a couple of times where I needed to blip the throttle to get the steering to respond. I still think the Redneck Ram is an awesome addition, and you can't beat the price. I think it will be perfect once I add the pump, and I did it all for less than a grand. Just been wondering about the fluid for the pump!

Current vehicles:
2007 Sahara 2-Door
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Stock rear Rubi Dana 44 with Auburn Ected locker w/ 35 spline chromoly shafts
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2.5 Rock Krawler X Factor System w/ Bilstein 5100 shocks
17X9.5 Spyderlock Beadlocks
37X12.50R17 Nitto Trail Grapplers
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JCR Stage 2 rock rails
Warn Zeon 10-S winch

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post #10 of 11 Old 01-08-2019, 11:04 AM
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In my semi-limited experience, as long as you run a good filter and cooler, there's no down side to ATF+4.

I've been running a PSC pump on ATF+4 for about 5 years now with zero problems (prob'ly just jinxed it ).


EDIT: I have a home-tapped box and PSC ram + 9000# hydraulic winch powered by the PSC pump, but I don't thrash my steering or max. out my winch regularly. YMMV.
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Last edited by ExWrench; 01-08-2019 at 11:07 AM.
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post #11 of 11 Old 01-31-2019, 04:07 PM
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I had ATF+4 in my system and it would whine,over heat and foam badly,swapped out for Aw32 hydraulic oil and all issues are gone, why use ATF if you can just use the right stuff and protect your expensive parts?

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