Power Steering Fluid or Ford Transmission Fluid in your PS Pump?

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1971 Ford Mustang Mach 1, 429 Super Cobra Jet, 4.11, Detroit Locker
The dipstick for my PS Steering pump (429 SCJ) indicates that I am to only use automatic transmission fluid (Type F) in it.

Does it really make a difference if one uses reputable brand of power steering fluid or transmission fluid in the pump? 

 
The dipstick for my PS Steering pump (429 SCJ) indicates that I am to only use automatic transmission fluid (Type F) in it.

Does it really make a difference if one uses reputable brand of power steering fluid or transmission fluid in the pump? 
The difference is the price of a pump.   In a nut shell most Power Steering fluids are very close to the same formulation as most modern ATF's and they contain friction modifiers.   Type F fluid contains no friction modifiers, but does contain anti-wear, seal swell, and anti-foam additives as mentioned above.


 


 
 

 


 
 
 

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