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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / October 2006

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ATF in PS Reservoir

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Joe Colella - 15 Oct 2006 18:49 GMT
I added about a 1/4 cup of Mercon V ATF to my PS reservoir.

Immediately realizing my mistake, I siphoned out all of the PS fluid and ATF
in the reservoir and refilled it with PS fluid, I then siphoned out all of
the fluid again and refilled it a second time with PS fluid, I then siphoned
it one last time and refilled it again.

Is there anything else I should do or am I good to go?

Thanks!

Joe
Don - 15 Oct 2006 20:05 GMT
>I added about a 1/4 cup of Mercon V ATF to my PS reservoir.

Some cars use Dexron ATF for PS fluid.  Haven't ever heard of Mercon V
for PS though.

>Immediately realizing my mistake, I siphoned out all of the PS fluid and ATF
>in the reservoir and refilled it with PS fluid, I then siphoned out all of
>the fluid again and refilled it a second time with PS fluid, I then siphoned
>it one last time and refilled it again.
>
>Is there anything else I should do

Relax!

> or am I good to go?

I think you are.

Don
www.donsautomotive.com

>Thanks!
>
>Joe
Knifeblade_03 - 15 Oct 2006 20:13 GMT
Should be okay now, just ensure fluid level is right, and run the
engine, turn the steering wheel L to R stop to stop around 4 times
each. Recheck fluid level, you should be fine.

Although

1] Did U run the engine before realizing mistake, prior to siphoning?

2] If so, you'll want to disonnect the return line and flush the fluid
out of the rack.

3]  If the engine wasn't run, when you added the fluid, and wasn't run
when you noticed the flub, and wasn't run until after you siphoned
everything out and replaced the fluid, you should be okay.  The minimal
residue of ATF left won't bother the system.

But, if the engine was run and introduced ATF into the power rack, you
need to bleed it out, re #2, in general for most cars.

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Knifeblade_03

http://www.automotiveforums.com

bob zee - 16 Oct 2006 13:56 GMT
> I added about a 1/4 cup of Mercon V ATF to my PS reservoir.
>
[quoted text clipped - 8 lines]
>
> Joe

why is this a mistake?  a power steering pump is a hydraulic pump.  an
automatic transmission is a hydraulic pump.  you put fluid in a pump
that was designed for a pump.  its all good!
:~)>

bob z.
hls - 17 Oct 2006 05:28 GMT
"bob zee" <bobzee1@gmail.com> wrote in message
> why is this a mistake?  a power steering pump is a hydraulic pump.  an
> automatic transmission is a hydraulic pump.  you put fluid in a pump
> that was designed for a pump.  its all good!
> :~)>
>
> bob z.

That could be bad advice, Bob Z.
Some cars take ATF as power steering fluid and others specifically say not
to use it.
I did it once because I didnt read the specifications (in a Buick) and ended
up having to replace hoses and the PS pump.
Was the failure related to the ATF fluid?  I dont know, but nowadays if they
specify power steering fluid, I comply.
bob zee - 17 Oct 2006 12:28 GMT
> That could be bad advice, Bob Z.
> Some cars take ATF as power steering fluid and others specifically say not
[quoted text clipped - 3 lines]
> Was the failure related to the ATF fluid?  I dont know, but nowadays if they
> specify power steering fluid, I comply.

Could be bad advice, yes, but the OP stated they did a lot of make-do
flushing.  I was just trying to help them relax.
:~)>

bob z.
hls - 17 Oct 2006 18:39 GMT
>> That could be bad advice, Bob Z.
>> Some cars take ATF as power steering fluid and others specifically say
[quoted text clipped - 12 lines]
>
> bob z.

Understand... And I also think they should relax.  They have done all they
can to return the system to specification.
John S. - 16 Oct 2006 15:57 GMT
> I added about a 1/4 cup of Mercon V ATF to my PS reservoir.
>
[quoted text clipped - 8 lines]
>
> Joe

Several cars use ATF for power steering fluid.  Check the owners manual
to see what you should be running.  In any case I don't think having
ATF in the reservoir for a moment is cause for worry.
Knifeblade_03 - 16 Oct 2006 17:42 GMT
Well, bob z., I agree with you in principle, but thinking of
application>>> would you put PS fluid into your automatic transmission?

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Knifeblade_03

http://www.automotiveforums.com

John S. - 16 Oct 2006 18:14 GMT
> Well, bob z., I agree with you in principle, but thinking of
> application>>> would you put PS fluid into your automatic transmission?

Several cars use ATF as power steering fluid, so those cars are using
power steering fluid in the automatic transmission and vice versa.

> --
> Knifeblade_03
[quoted text clipped - 3 lines]
>
> http://www.automotiveforums.com
Steve - 16 Oct 2006 18:39 GMT
>>Well, bob z., I agree with you in principle, but thinking of
>>application>>> would you put PS fluid into your automatic transmission?
>
> Several cars use ATF as power steering fluid, so those cars are using
> power steering fluid in the automatic transmission and vice versa.

Many other cars specifically state NOT to use ATF in the PS system. It
would be helpful to know what kind of car we're talking about here.

But even if it is one that doesn't allow ATF in the PS system, I think
the flushing should take care of the issue.
Don Bruder - 16 Oct 2006 21:38 GMT
> Well, bob z., I agree with you in principle, but thinking of
> application>>> would you put PS fluid into your automatic transmission?

I wouldn't, but mainly because of the viscosity difference. (PS fluid is
usually closer to water than oil in viscosity)

Aside from that factor... <shrug> The only other consideration is
whether the rubber/plastic in the system would cope with it without
going into meltdown mode.

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Don Bruder - dakidd@sonic.net - If your "From:" address isn't on my whitelist,
or the subject of the message doesn't contain the exact text "PopperAndShadow"
somewhere, any message sent to this address will go in the garbage without my
ever knowing it arrived. Sorry... <http://www.sonic.net/~dakidd> for more info

Andy Dingley <dingbat@codesmiths.com> - 16 Oct 2006 22:55 GMT
> Is there anything else I should do or am I good to go?

It's not a Honda or an Audi is it?  They are _very_ fussy.

Other than that, yeah, you're sorted.
 
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