What kind of power steering fluid do I have? - 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 #1 of 17 (permalink) Old 11-29-2018, 03:03 PM Thread Starter
 
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What kind of power steering fluid do I have?

Just swapped out my gearbox for a redhead and planning to do a flush. My question is this; the current power steering fluid is almost clear, maybe more engine oil colored. It is not RED/PURPLE like dexron III ATF fluid. I know its virtually impossible to say for sure what fluid this is BUT it definitely is not dexron III. With a new steering gearbox I definitely want to ensure I get the correct fluid in and dont want to worry about mixing synthetic or atf or non-synthetic. Should I just flush it with dexron III and call it good?

2007 2500HD, 4" full exhaust, K&N, 6" lift with 305's and Fox 2.0 shocks, Edge evo, 106k miles.
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post #2 of 17 (permalink) Old 11-29-2018, 03:38 PM
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Don't use ATF, that's old school. Seals used today and unknown additives, aren't always compatible. And testing I've done, it didn't really do any better holding up to the heat load than plain dino did, which was cheaper.

Doubtful that it's syn. Regular is a honey off clear color. Yours is probably dirty/torched.

Not a lot of choices now for syn PS fluid; Redline, purple, ams
Redline actually performed worse than dino did.
Purple, it was okay, but being black in color, you couldn't tell when it was time to flush the fluid.
Both weren't cheap.

If you really want to make a difference with system longevity, your best bet is to add a PS fluid cooler to the mix. Reduces the heat load and increases system volume, then regular off the shelf house brand dino PS fluid holds up just fine.

https://www.duramaxforum.com/forum/d...id-cooler.html

https://www.duramaxforum.com/forum/d...ost-flush.html

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 #3 of 17 (permalink) Old 11-29-2018, 06:31 PM Thread Starter
 
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Quote:
Originally Posted by Hook'em_Horns! View Post
Don't use ATF, that's old school. Seals used today and unknown additives, aren't always compatible. And testing I've done, it didn't really do any better holding up to the heat load than plain dino did, which was cheaper.

Doubtful that it's syn. Regular is a honey off clear color. Yours is probably dirty/torched.

Not a lot of choices now for syn PS fluid; Redline, purple, ams
Redline actually performed worse than dino did.
Purple, it was okay, but being black in color, you couldn't tell when it was time to flush the fluid.
Both weren't cheap.

If you really want to make a difference with system longevity, your best bet is to add a PS fluid cooler to the mix. Reduces the heat load and increases system volume, then regular off the shelf house brand dino PS fluid holds up just fine.

https://www.duramaxforum.com/forum/d...id-cooler.html

https://www.duramaxforum.com/forum/d...ost-flush.html
Awesome, thanks for the insight! I ended calling RedHead and they said I should just use Dexron III, top it off, follow the fill procedure, then flush it tomorrow with Dexron III. Too much confusing/conflicting information out there now days. Is there anything negative to using ATF??

Thanks again, appreciate the insight!

2007 2500HD, 4" full exhaust, K&N, 6" lift with 305's and Fox 2.0 shocks, Edge evo, 106k miles.
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post #4 of 17 (permalink) Old 11-29-2018, 08:22 PM
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Over time and use and years of daily heavy hauling, I've been thru every component failing and springing leaks. During that period of numerous High Pressure lines failing, HB unit seals failing, pump failing,...I was also testing different fluids.

One of those tried was ATF. And seals failed.
Now, was the real reason for failure, the heat load?
Or was the ATF a contributor to the hose ends failing?
Repeatedly.

Perhaps Red feels good about their seals and Dex. But the PS pump seals, the HB seals, and the crimped hose ends....are not their product. We've already seen that damage can occur to trans seals (that were designed for D-III) and using D-VI.

So seals can differ.

I recommend plain dino with the added fluid cooler. It's the setup that hasn't failed, on any component since it's install. Steering doesn't jamb up when backing a trailer after a long day of towing. Brake boost stays strong. And no leaks.

ATF just never showed to be superlative in holding up to the heat. I saw no gain, and it was more $$ per quart.

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
I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"

Last edited by Hook'em_Horns!; 11-29-2018 at 08:25 PM.
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post #5 of 17 (permalink) Old 11-29-2018, 08:35 PM Thread Starter
 
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Quote:
Originally Posted by Hook'em_Horns! View Post
Over time and use and years of daily heavy hauling, I've been thru every component failing and springing leaks. During that period of numerous High Pressure lines failing, HB unit seals failing, pump failing,...I was also testing different fluids.

One of those tried was ATF. And seals failed.
Now, was the real reason for failure, the heat load?
Or was the ATF a contributor to the hose ends failing?
Repeatedly.

Perhaps Red feels good about their seals and Dex. But the PS pump seals, the HB seals, and the crimped hose ends....are not their product. We've already seen that damage can occur to trans seals (that were designed for D-III) and using D-VI.

So seals can differ.

I recommend plain dino with the added fluid cooler. It's the setup that hasn't failed, on any component since it's install. Steering doesn't jamb up when backing a trailer after a long day of towing. Brake boost stays strong. And no leaks.

ATF just never showed to be superlative in holding up to the heat. I saw no gain, and it was more $$ per quart.
roger that!! forgive my ignorance but what is plain "dino"?

2007 2500HD, 4" full exhaust, K&N, 6" lift with 305's and Fox 2.0 shocks, Edge evo, 106k miles.
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post #6 of 17 (permalink) Old 11-29-2018, 08:39 PM
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dinosaur fluid.....Oil from the ground.

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
I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"
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post #7 of 17 (permalink) Old 11-29-2018, 09:31 PM Thread Starter
 
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Quote:
Originally Posted by Hook'em_Horns! View Post
dinosaur fluid.....Oil from the ground.
Just plain old napa power steering fluid and a factory GM cooler it is. Thanks again!

2007 2500HD, 4" full exhaust, K&N, 6" lift with 305's and Fox 2.0 shocks, Edge evo, 106k miles.
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post #8 of 17 (permalink) Old 01-02-2020, 07:51 AM
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Quote:
Originally Posted by Hook'em_Horns! View Post
Over time and use and years of daily heavy hauling, I've been thru every component failing and springing leaks. During that period of numerous High Pressure lines failing, HB unit seals failing, pump failing,...I was also testing different fluids.

One of those tried was ATF. And seals failed.
Now, was the real reason for failure, the heat load?
Or was the ATF a contributor to the hose ends failing?
Repeatedly.

Perhaps Red feels good about their seals and Dex. But the PS pump seals, the HB seals, and the crimped hose ends....are not their product. We've already seen that damage can occur to trans seals (that were designed for D-III) and using D-VI.

So seals can differ.

I recommend plain dino with the added fluid cooler. It's the setup that hasn't failed, on any component since it's install. Steering doesn't jamb up when backing a trailer after a long day of towing. Brake boost stays strong. And no leaks.

ATF just never showed to be superlative in holding up to the heat. I saw no gain, and it was more $$ per quart.
What about Mobile Delvac or Transynd? When I hear "ATF" i think old fluid like Dex III and don't know if it applies to modern fluids. I've searched some threads and seen the question asked but no real answers.

Why do I want to do that? K.I.S.S. It's one less different fluid to keep around.
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post #9 of 17 (permalink) Old 01-02-2020, 08:05 AM
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Quote:
It's one less different fluid to keep around.
It's a sealed system. It doesn't 'use' fluid, as the engine can in regards to oil.
It's not something you have to top off regularly, so having it around isn't prudent. If you need fluid, you have a leak. Fix the leak.

Same as with having TES-295 around, other than adding some to the spin-on when replacing, it's a sealed system.


Edit....now that I think about it, there's is that periodic need to flush the PS fluid, so there's that.
I've got two qts of house brand generic PS fluid on the shelf from the Irish, waiting for the next flush needed.
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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
I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"

Last edited by Hook'em_Horns!; 01-02-2020 at 08:07 AM.
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post #10 of 17 (permalink) Old 01-02-2020, 08:36 AM
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Thanks for your reply but it didn't answer my primary question. Is Mobile Delvac/Transynd good for PS? If you're trying to avoid an argument, don't worry, I'm asking, not telling. I'll take your word for it either way.
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