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?
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.