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Old 01-06-2004, 02:43 PM   #1 (permalink)
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ATF in the PS pump?

Good or bad? what have you heard?
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Old 01-06-2004, 02:59 PM   #2 (permalink)
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What pump??? My 1970 blazer drinks it. Im pretty sure all sagnaw pumps and boxs use it.
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Old 01-06-2004, 03:01 PM   #3 (permalink)
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Quote:
Originally posted by TheLakeRat
PS fluid is basicly hydraulic fluid. Some are different than others. most are petro based but GM fluid is mineral oil based and seems to work a little better.
ATF is hydralic fluid with several additives. anti foaming, friction inhibitors, detergents, etc...
Both will work in your power steering box but the problem is that with ATF something in the additives is very prone to hardening the rubber o-rings and seals in the box.
Now all saginaw boxes built after around the 97 mark don't use rubber orings and seals so that you can use ATF with no troubles.

Hope this was what you were looking for.
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Old 01-06-2004, 03:07 PM   #4 (permalink)
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Old 01-06-2004, 03:23 PM   #5 (permalink)
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I know in my 2000 f350 it uses ATF in the power steering but have heard mixed results in useing it in a sagnaw pump. I know it will work to get you home but don't think it is the way to go for every day use.
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Old 01-06-2004, 03:28 PM   #6 (permalink)
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Quote:
Originally posted by 66CJdean
I know in my 2000 f350 it uses ATF in the power steering but have heard mixed results in useing it in a sagnaw pump. I know it will work to get you home but don't think it is the way to go for every day use.
That's pretty much what I had heard.
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Old 01-07-2004, 07:49 AM   #7 (permalink)
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I know that when I got a new pump from a local parts dealer they told me they would not warrenty the pump if I used ATF. I think it was a ploy to get me to buy a jug of PS fluid!
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Old 01-07-2004, 08:55 AM   #8 (permalink)
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Never ever ever run ATF in your saginaw pump,sure it works in your everyday car but when you start over working the power steering thats when trouble starts. WE use GM MR GOODWRENCH P/S FLUID P/N # 89020661 or we have our own oil that we made for hi RPM , like offroad racing/ short course where we run the pump 8000 max rpm.
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Old 01-07-2004, 09:02 AM   #9 (permalink)
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Quote:
PS fluid is basicly hydraulic fluid. Some are different than others. most are petro based but GM fluid is mineral oil based and seems to work a little better.
ATF is hydralic fluid with several additives. anti foaming, friction inhibitors, detergents, etc...
Both will work in your power steering box but the problem is that with ATF something in the additives is very prone to hardening the rubber o-rings and seals in the box.
Now all saginaw boxes built after around the 97 mark don't use rubber orings and seals so that you can use ATF with no troubles.
My '73 Chevy specifies Dexron for the power steering, so that's what I've used for several years. Up until about a month ago... The steering box started puking fluid faster than I could pour it in. After pulling the box apart and replacing all the seals (which were hard as rocks) I will never use ATF again!!
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Old 01-07-2004, 09:05 AM   #10 (permalink)
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I have been using ATF in mine but think I am going to switch to Hydrolic (spelling) because it will stay a little cooler.
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Old 01-07-2004, 09:22 AM   #11 (permalink)
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Toyota Specifies ATF for their pumps.
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Old 01-07-2004, 10:38 AM   #12 (permalink)
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Suzuki specs only ATF, also.
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Old 01-07-2004, 10:59 AM   #13 (permalink)
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YES some pumps do use ATF like FORD EATON ,we sometimes use this pump in trophy trucks and we found the best ATF is MOBILE -ONE BUT you should only run the p/s fluid that the manufacture recommends.SAGINAW pumps never uses ATF. And its true ATF will harden the seals & o-rings.I think Toyota & Ford like to sell seal kits.
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Old 01-07-2004, 11:27 AM   #14 (permalink)
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Quote:
Originally posted by 66CJdean
I know in my 2000 f350 it uses ATF in the power steering but have heard mixed results in useing it in a sagnaw pump. I know it will work to get you home but don't think it is the way to go for every day use.
hmmm, I wonder if it will quiet down a noisy pump (typical ford, ehh) on my 99 F350...
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Old 01-07-2004, 11:45 AM   #15 (permalink)
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Gee, maybe I shouldn't have used ATF in my Blazer P/S...

for 198,000 miles.

I'm certain it was a Saginaw pump.

I don't know that I have ever used anything other than ATF in the PS pumps on my GM vehicles. The P/U I had before the Blazer, had 98,000 miles when the crankshaft broke, but the P/S pump was still running fine.

Obviously, not all have such positive performance.

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Old 01-07-2004, 02:09 PM   #16 (permalink)
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I just put syn ATF in my pump for the last trail run and the pump seems to run alot smoother.....
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Old 01-07-2004, 08:06 PM   #17 (permalink)
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Im running Dextron 3 atf in my saginaw steering pump for a year now, and its working great.
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Old 01-07-2004, 08:13 PM   #18 (permalink)
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the only vehicle i've run into problems with using ATF in place of PS fluid is a 2000 ford taurus. the ATF would just buble up and out every time. every other vehicle i've run across hasn't minded atf at all.
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