Correct power steering fluid

JJHstang · Jul 12, 2021

What type of power steering fluid should I use in my 71 Mach 1?
I read conflicting information.
Some say use a certain type transmission fluid, others say ATF transmission fluid can damage the pump.

HemiRick · Jul 12, 2021

ATF has friction modifiers that are not good for the PS, use PS fluid.

a91what · Jul 12, 2021

I have never had a problem using type F fluid in my PS system.

JJHstang · Jul 13, 2021

Thank you all for the info.

Question.
I plan on sucking out the existing fluid or as much as I can, filling with fresh, then repeating a few times. How much fluid does the pump need.
Does anyone have a link to video on flushing 71 - 73 Mustang fastback or a video that I can look up to help me even if not the exact year Mustang?

JJHstang · Jul 13, 2021

Getting confused which is not unusual.
I have read do not use ATF type transmission fluid use Type F.
When searching Type F power steering fluid the search either comes up with Type F Transmission fluid or just Power Steering fluid no type F. Also someone said don’t use power steering fluid.

So I should be using Type F transmission fluid just not ATF.?

JJHstang · Jul 13, 2021

Sorry everyone
I apologize for taking up your time. I will purchase Typpe F transmission fluid. I should have looked at my dipstick.
Again sorry.

a91what · Jul 13, 2021

No problem, type F I use in all Ford ps systems up to 93.. it quites them down, ps fluid on older systems eats the seals.

JJHstang · Jul 14, 2021

Never have used P/S fluid but have added ATF. I am glad people said use Type F because my dip stick just shows use Automatic Transmission Fluid not Type F.
Today I suctioned out as much as I could, added new Type F, ran until warm. Suctioned out again, added new. I will run awhile and do it again a few more times. I don’t have a manual, not sure how much the system actual has in it. I do know I can’t suction to much at a time.

7991LXnSHO · Jul 16, 2021

HemiRick said:
ATF has friction modifiers that are not good for the PS, use PS fluid.

Automatic Transmission Fluid = ATF (It does not mean Alcohol, Tobacco & Firearms in this case.)
In older Ford’s, it does not mean Dextron or Mercon ATF. It means the same ATF as an automatic of the same make and year would use.

manicmechanic007 · Jul 18, 2021

Factory fill was type F ATF

zookeeper · Jul 18, 2021

Used Type F for longer than I care to remember. Works fine

HemiRick · Jul 24, 2021

View: https://www.youtube.com/watch?v=5b0brwbSdZw

a91what · Jul 24, 2021

https://www.motorcraft.com/us/en_us/home/our-products/chemicals-and-lubricants/transmission-fluid/type-f-automatic-transmission-fluid-and-power-steering-fluids.html

I don't care what dude says... Ford specs type F power steering fluid.

Potomus Pete · Jul 24, 2021

F Type for me. When I changed my rack I spent hours reading, and F Type was the verdict.

Potomus Pete · Jul 24, 2021

That was a year ago, and it works/sounds great.

7991LXnSHO · Jul 24, 2021

Potomus Pete said:
F Type for me. When I changed my rack I spent hours reading, and F Type was the verdict.

HemiRick said:
View: https://www.youtube.com/watch?v=5b0brwbSdZw

That’s not what the manufacturer info for vintage Fords or GM’s say. The newer stuff and imports often spec something different, but not our cars. Most of power steering fluids at the chemical idle are thinner and cheaper than bulk hydraulic fluid. This company might sell something better, or it still might be overpriced Type A equivalent lube.

RositaSchaefer · Aug 13, 2021

HemiRick said:
View: https://www.youtube.com/watch?v=5b0brwbSdZw tracking software

My power steering pump comes standard with ATF, GM. ATF recommended lol

manicmechanic007 · Aug 13, 2021

True story Rosita, The ZF pumps always used Mercon The Eaton, Thompson and C2 pumps all used type F The Eaton was the real early one with the reservoir on the top like the full size cars of the early 60's The Thompson is the pencil neck pump and you all know the noisy C2. The ZF is the newer little one that comes on Fords now since about 1990-91 or since the 4.6 modular came out

Correct power steering fluid

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