What kind of power steering fluid do I have? - Page 2 - Chevy and GMC Duramax Diesel Forum
06-07 LBZ & LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #11 of 17 (permalink) Old 01-02-2020, 08:41 AM
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Try it and see. $11qt vs less than $3qt.

I'm not going to, as stated, I've been down that road and it was a dead end.
It's not PS fluid, it's ATF. My opinion.

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post #12 of 17 (permalink) Old 01-02-2020, 08:53 AM
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Good enough! Although the Royal Purple and Amsoil you recommend is a lot more than $3 per qt. I'm going Royal Purple. Mostly because I can buy it locally from Autozone and don't have to order a case. I'm also doing the cooler you recommended 1000 times. Although the truck made it 11 years and 240K miles without one, and I don't plan on keeping the truck more than another year, you brainwashed me into it, lol.
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post #13 of 17 (permalink) Old 01-02-2020, 09:05 AM
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Quote:
Although the Royal Purple and Amsoil you recommend is a lot more than $3 per qt.
I don't recall recommending either.

2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air

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post #14 of 17 (permalink) Old 01-02-2020, 09:20 AM
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My mistake... I went back and looked and apparently you recommended 'synthetic' but not really a brand and you said Amsoil, Royal Purple, and Redline were the only ones available but Redline couldn't handle the heat.

Last edited by Nitro Junkie; 01-03-2020 at 02:08 PM. Reason: Grammar
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post #15 of 17 (permalink) Old 01-03-2020, 02:07 PM
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Originally Posted by Hook'em_Horns! View Post
I don't recall recommending either.
This has been bugging me a bit and I'm probably worried about nothing but, I don't like words put into my mouth, so I try to be careful not to do it to others. You never said "I recommend". I, after looking at some threads about this subject, 'interpreted' what you said about synthetics and the manufacturers that offer them as a recommendation.
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post #16 of 17 (permalink) Old 01-03-2020, 02:36 PM
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This has evolved over many years.

Things that I do on a daily basis with the HD exceeds mfrs ratings. Towing 8 tons over their suggested ratings, up and down hills they didn't use in their testing, combined with heavy traffic far beyond their test ranges.

The PS fluid was constantly being torched, and along with that all of the components in the system suffered from the abuse.

1st step was to try and find a fluid that would hold up better. This was about the time that Valvoline gave up on syn PS fluid (there's a clue there if they discontinued it). That left 3 on the market; ams, red and purple.

I did try Valvoline atf (seen in my years old PS/HB flush DIY), it may have been coincidence, but the system soon started springing leaks with ATF.
Subsequent research revealed things in ATF that are not necessarily compatible with today's PS systems (warnings are numerous).

And it didn't hold up to the heat any better than plain PS fluid.

ams was prohibitively expensive and hard to obtain. Red was cheaper than purple, but failed miserably under high heat (it was actually worse than plain PS fluid).

Purple did better than dino, but still failed under high heat extremes.
And the black color after use made it difficult to determine fluid condition.

After years of trial and error, component failures, and what seemed to be a continual mess of fluid in the engine bay, the final solution was found.

Reduce the heat load on the system by adding a fluid cooler to the mix.
Fairly simple to do and cheaper than a single HP fluid line is.

You'll still need to service/change the PS fluid over time (yearly?), but no where near the level of having no cooler at all (monthly).
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2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air

Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab
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post #17 of 17 (permalink) Old 01-03-2020, 03:25 PM
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Originally Posted by Hook'em_Horns! View Post
This has evolved over many years.

Things that I do on a daily basis with the HD exceeds mfrs ratings. Towing 8 tons over their suggested ratings, up and down hills they didn't use in their testing, combined with heavy traffic far beyond their test ranges.
Like a 2500 SRW that weighs 11,000 with EDC plus driver and passenger? I get a chuckle when I go to the scrap yard and I have more weight on the front axle than the gross weight of the mid-size truck/SUV in front of me plus what he's dumping. Occaisionally I exceed 12k and I've been over 13k carrying roughly a ton on the "ladder" rack but that's sketchy AF.

Yes, I know I need a 3500 but I didn't expect the truck to get this heavy.
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