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Power Steering fluid vs ATF

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atf fluid power steering power steering fluid
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9.5K views 5 replies 3 participants last post by  Jeepster09  
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#1 ·
I have a 2009 Impala Police Package. My rack and pinion and power steering pump were replaced by my mechanic. He refilled the system with ATF as he insisted that that's what GM vehicles use. I've previously filled the system with regular Prestone power steering fluid. Which is correct?
 
Discussion starter · #5 ·
Jeepster09 said:
I believe it is more about profit than actual need...ATF works fine for seals, high temperatures and gears and was always used years ago. I have used it with out issue in p/s systems. Oh and make sure you ALWAYS use HARLEY OIL in your Harley.
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"ATF was always used years ago." Correct. In vehicles that called for it. ATF and PS fluid are somewhat interchangeable, and have a lot of the same characteristics, but they are by no means identical. I believe PS fluid is higher viscosity for example.
 
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