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Author Topic: Dextron/mercon as power steering fluid  (Read 10460 times)

Offline 77 step

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Dextron/mercon as power steering fluid
« on: February 20, 2010, 06:48:54 pm »
Hi, been away a while... getting back to work on the '77 Chevy.  I was wondering if anyone has tried dextron/mercon in their power steering systems, and what the results were. 

I know a lot of Fords (is that swearing here?  :o) use it in their power steering systems, but I am wondering if there is a difference in the seals in our systems.

Thanks!
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Sean

1977 K-10 stepside under slow reconstruction.

Offline Layne

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Re: Dextron/mercon as power steering fluid
« Reply #1 on: February 20, 2010, 07:18:21 pm »
You mean the atf right? I dunno I've considered doing atf in there before. Good question
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline 4x4HighSierra

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Re: Dextron/mercon as power steering fluid
« Reply #2 on: February 20, 2010, 07:23:18 pm »
ATF is fine to run in a chevy ive ran it for years in my lowrider GMC and my 4x4 GMC.
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1985 GMC High Sierra K10 mild 350 and rebuilt 700R4 with transgo shift kit

1985 GMC Sierra Classic C10 TPI 350 swapped in and 700R4 and 6 inch drop, with front drop spindles and a axle flip in the back and c notched frame

1995 Chevy Tahoe LT stock

Offline 77 step

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Re: Dextron/mercon as power steering fluid
« Reply #3 on: February 20, 2010, 08:44:12 pm »
Quote from: 4x4HighSierra on February 20, 2010, 07:23:18 pm
ATF is fine to run in a chevy ive ran it for years in my lowrider GMC and my 4x4 GMC.

Thanks for the response.  I thought it would be ok, but feel better about trying it now.
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Sean

1977 K-10 stepside under slow reconstruction.

Offline 87OldYeller

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Re: Dextron/mercon as power steering fluid
« Reply #4 on: February 20, 2010, 09:21:16 pm »
i have never used anything but aft in powersteering.
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Offline VileZambonie

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Re: Dextron/mercon as power steering fluid
« Reply #5 on: February 21, 2010, 10:53:41 am »
Usage depends on seals that are used. Go with what is recommended or you might end up with some premature leaks.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline bobcooter

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Re: Dextron/mercon as power steering fluid
« Reply #6 on: February 22, 2010, 01:37:23 pm »
Vile's right. I used it on an old 77 I had years ago, and it started leaking around the shaft.
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'79 C-20, 350/400, 3:73 gears, 9 leafs and a headache rack
Favorite Quote, "Good judgement comes from experience. Experience comes from poor judgement."

Offline brownie

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Re: Dextron/mercon as power steering fluid
« Reply #7 on: February 23, 2010, 10:34:33 am »
the 77 came with atf as the power steering fluid.
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Offline 77 step

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Re: Dextron/mercon as power steering fluid
« Reply #8 on: February 23, 2010, 07:51:17 pm »
Actually, the 77 used "GM power steering fluid or equivalent" according to my Haynes manual.  Don't have an owners manual in the glove box (imagine that ::)).
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Sean

1977 K-10 stepside under slow reconstruction.

Offline bobcooter

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Re: Dextron/mercon as power steering fluid
« Reply #9 on: February 24, 2010, 10:03:47 am »
Quote from: bobcooter on February 22, 2010, 01:37:23 pm
Vile's right. I used it on an old 77 I had years ago, and it started leaking around the shaft.
Quote from: brownie on February 23, 2010, 10:34:33 am
the 77 came with atf as the power steering fluid.
My 77 was 4 different colors when I bought it, so I don't know if it had 77 power steering pump or not. ;D
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'79 C-20, 350/400, 3:73 gears, 9 leafs and a headache rack
Favorite Quote, "Good judgement comes from experience. Experience comes from poor judgement."

Offline 77 step

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Re: Dextron/mercon as power steering fluid
« Reply #10 on: February 25, 2010, 12:46:59 pm »
Mine is still 4 colors, at least! ;D
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Sean

1977 K-10 stepside under slow reconstruction.

Offline bobcooter

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  • 1979 Scottsdale C-20
Re: Dextron/mercon as power steering fluid
« Reply #11 on: February 27, 2010, 07:09:20 am »
Mine was short, wide that was 4 different colors (mostly brown) with a set of Weld Draglites with 70's on the front and 60's on the back. It was love at first sight!
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'79 C-20, 350/400, 3:73 gears, 9 leafs and a headache rack
Favorite Quote, "Good judgement comes from experience. Experience comes from poor judgement."
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