but whatever, its mechanics like you that keep my Honest shop alive, so keep going, bc it does make me money A little is ok, but filling it up with nothing but especially after doing work on the system, is stupid in itself. i just feel bad for ur customers who are coming to ur "Mechanic Shop" and having any kind of PS work done and getting ATF fluid in the system instead of ATF. If you do, I personally think ur a idiot for doing that, but hey its ur car, not mine so I really dont care. But I will agree with u to a point, you can use ATF in PS systems, BUT ONLY A LITTLE AT A TIME. Yes there both hydraulic fluids, but there not the same mixture of chemicals. BUT ATF fluid expands 2-3times its size, and PS fluid might expand. NO The auto trans ususes the pressure to switch gears. But hey again, what do we know.Īnd as far as ur comment about it being hydraulic fluid. Mind you were all MASTER CERTIFIED and have all worked in dealerships. Oh, and I guess the 12 Mechanics I work with, as well as the the shop that me and my buddy OWN with the 2 techs there are also wrong saying ATF isnt the same as PS fluid. Keep doing as you wish buddy, thats ur name on the line, not mine. Well guess what, after about a hour of driving, the ATF was pissing out of the PS reservior, getting onto the engine, smoking and such. I personally have seen what happens when you fill (WHILE COLD) a PS reservior with ATF and bleed the system, it lowers down, you fill it back to cold, bleed it more, and so fourth and so on. But this isnt a dick measure contest bc I really dont care what you think. I love it how you think I have no idea how to fill a PS reservior nor bleed it. But hey, what do I know, right? Onecleancavi is right, there are tons of debates over this stuff. I have been working on cars longer then u have been driving. Since you seem to know it all, I wont get into it with you no more. and they all expand when heated, point in case Look it up ps fluid, atf, brake fluid, just to list the ones used in this form, they are all hydraulic fluids, what do you think drives an automatic transmission. So I dont think ur correct saying PS fluid IS ATF fluid. If U fill it up with PS fluid, like you should, it wont leak. If you fill the PS reservior with ATF fluid, ur gonna have it pissing out everywhere from the reservior. ATF also expands when its gets hot, PS fluid does not. Just bc PS fluid is pretty much a hydraulic fluid you put into ur system. So im not saying ur lieing, but I find that really hard to believe. Ummm, I never heard of power steering fluid being ATF. Walterc1 wrote:oh and just another tid bit of info But then again, I never had PS fluid expand and piss over everything when hot It maybe just me, but I hate putting anything into any system that it does not call for, IDC how close to each other they are. BTW it was on a 99 Taurus that we had just got done swapping the motor on. Hense the reason when me and my partner (Whom I run a shop with) did this with a customers car, I pulled all the fluid out of the system, and put PS fluid in it. I know if I was one of ur customers and U put ATF in the PS system, and it pissed all over my engine, I would personally be pissed. ALWAYS put what the manufacturer says to put in there. Putting in the wrong fluid can destroy the pump, or shorten it's life. I think mini's too as well, they are owned by BMW.Īlways check what thew manufacturer specifies. Sunfiretun3r wrote:BMW's use brake fluid. ![]() I NEVER recommend using ATF in a PS system that calls for PS fluid. I have also personally seen what happens when u add just atf to a PS reservior and the mess it makes when it gets hot and expands. Never heard of them being close or anything like that. Well, I am too a mechanic, been working on cars for a little over 10 years, been in the parts side of things for over 8 years. Walterc1 wrote:atf and power steering fluid are very very very very close to the same, may not be exactly the same but it will not affect anything, i am a mechanic and we always use atf, cause ps fluid is more expensive and there is no need to waist your money, but i would be careful because some newer car i have seen dont call for ps fluid, they call for something else, just cant remember what it was, but with this you cant use either ps fluid of atf
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