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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / February 2007

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power steering, which fluid?

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J J - 11 Feb 2007 13:05 GMT
Most places put Mercon/dextron in the power steering pump.  It is red in
color. But you can also buy power steering fluid which is clear.
If the only difference is color why doesn't the transmission fluid
bottles say can be used in power steering also?  
If they are 100% the same why hasnt some company labeled it as for use
in transmissions and power steering?

My 1987 town car  had ps pump replaced, the fluid was clear but had a
green tint to it.  What does the green color mean?  If i had red
transmission fluid in it you could not detect the color like with clear
ps fluid.
Scrapper - 11 Feb 2007 13:29 GMT
i've been using tranny fluid for years in my power steering...and dono
why they don't why they don't put for power sterring....but it works.

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Steve - 12 Feb 2007 15:46 GMT
> i've been using tranny fluid for years in my power steering...and dono
> why they don't why they don't put for power sterring....but it works.

Not in all systems. ATF will weep right through the rubber components in
some systems (at best) or weaken the rubber until it false (at worst).
Nate Nagel - 11 Feb 2007 13:44 GMT
> Most places put Mercon/dextron in the power steering pump.  It is red in
> color. But you can also buy power steering fluid which is clear.
> If the only difference is color why doesn't the transmission fluid
> bottles say can be used in power steering also?  
> If they are 100% the same why hasnt some company labeled it as for use
> in transmissions and power steering?

They're not 100% the same, although to be honest I couldn't tell you
what the differences are.  They are *basically* the same, however.

> My 1987 town car  had ps pump replaced, the fluid was clear but had a
> green tint to it.  What does the green color mean?  If i had red
> transmission fluid in it you could not detect the color like with clear
> ps fluid.

I think a green tint generally denotes a mineral oil; check your manual
to see if it recommends some different type of fluid than normal.  It's
important to use the right type of fluid; practically any fluid will
work FOR A WHILE but you need to use the right type for the sake of all
the rubber components - they may not be compatible with any given fluid,
if it's not the one spec'd in the manual.

Which reminds me, I was going to flush the P/S in the Corrado...  I
think someone put regular P/S fluid in it when it's supposed to use the
Pentosin mineral oil stuff...

good luck,

nate

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* - 11 Feb 2007 13:50 GMT
J J <Lauren__C@webtv.net> wrote in article
<20810-45CF1498-933@storefull-3236.bay.webtv.net>...
> Most places put Mercon/dextron in the power steering pump.  It is red in
> color.

I don't know what you are referring to when you say "Most places..." but,
most REAL automotive shops use power steering fluid these days.

> If the only difference is color why doesn't the transmission fluid
> bottles say can be used in power steering also?

Because color is not the ONLY difference......

> If they are 100% the same why hasnt some company labeled it as for use
> in transmissions and power steering?

Were it the same, I'm sure some market-savvy company would, indeed, label
the same product for dual usage...

See above answer....


> My 1987 town car  had ps pump replaced, the fluid was clear but had a
> green tint to it.  What does the green color mean?  

It means that the manufacturer dyed the fluid green....

> If i had red
> transmission fluid in it you could not detect the color like with clear
> ps fluid.....

...your point being....?
HLS@nospam.nix - 11 Feb 2007 13:58 GMT
> Most places put Mercon/dextron in the power steering pump.  It is red in
> color. But you can also buy power steering fluid which is clear.

Several years ago, GM starting specifying power steering fluid.  I kept
using ATF because
I didnt read the manual, and had to replace hoses and a PS pump.

Were the failures related?  I dont know.  Could be normal GM failure rates,
but from that
time on, if it says power steering fluid, that is what I use. (And I have
had no more failures)
John S. - 11 Feb 2007 16:08 GMT
> Most places put Mercon/dextron in the power steering pump.  It is red in
> color. But you can also buy power steering fluid which is clear.
> If the only difference is color why doesn't the transmission fluid
> bottles say can be used in power steering also?

My very strong suggestion would be to just follow the instructions in
your owners manual.  And be sure to flush the power steering system
periodically too.


> If they are 100% the same why hasnt some company labeled it as for use
> in transmissions and power steering?
>
> My 1987 town car  had ps pump replaced, the fluid was clear but had a
> green tint to it.  What does the green color mean?  

> If i had red
> transmission fluid in it you could not detect the color like with clear
> ps fluid.

Well, yes that is true.  But I don't understand your point.
Daryl Bryant - 12 Feb 2007 03:46 GMT
> Most places put Mercon/dextron in the power steering pump.  It is red in
> color. But you can also buy power steering fluid which is clear.
> If the only difference is color why doesn't the transmission fluid
> bottles say can be used in power steering also?

Because FORD's are a different species

> If they are 100% the same why hasnt some company labeled it as for use
> in transmissions and power steering?

Nope, (close) not the same thing - some contain mineral oils and some do
not - you cannot use mineral oil in your automatic tranns

> My 1987 town car  had ps pump replaced, the fluid was clear but had a
> green tint to it.  What does the green color mean?  If i had red

The slight green tint is for leak detection!

> transmission fluid in it you could not detect the color like with clear
> ps fluid.
Steve - 12 Feb 2007 15:44 GMT
> Most places put Mercon/dextron in the power steering pump.  It is red in
> color. But you can also buy power steering fluid which is clear.
[quoted text clipped - 7 lines]
> transmission fluid in it you could not detect the color like with clear
> ps fluid.

Color means nothing, unfortunately. Refer to your owners manual for the
correct type of fluid to use in the power steering system.

And its DEXRON, "dexTron" is not a word.
 
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