The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-55.1 A few general questions about my project

mr48chev · 06-22-2020, 08:40 PM

Type F was specified by Ford for Ford vehicles with rack and pinion steering built before 1996/98 According to this https://www.motorcraft.com/us/en_us/...ng-fluids.html

When I worked in Pontiac dealerships where I did a low of power steering pumps and steering boxes I could often quiet down a 70's GM pump that someone had put atf in by bleeding the atf out and filling it with genuine GM power steering fluid.

I'd probably go with a high quality type F as that is what the seals in the rack are compatible and I don't believe that it will cause an issue with the pump. Ford used a lot of Saginaw pumps running them with Type F fluid.

What I am finding is DO NOT USE synthetic power steering fluids or fluids with any leak stop additives in them. The MII or 80's Mustang's racks seals don't seem to like either.

06-22-2020, 08:40 PM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,287	Re: A few general questions about my project Type F was specified by Ford for Ford vehicles with rack and pinion steering built before 1996/98 According to this https://www.motorcraft.com/us/en_us/...ng-fluids.html When I worked in Pontiac dealerships where I did a low of power steering pumps and steering boxes I could often quiet down a 70's GM pump that someone had put atf in by bleeding the atf out and filling it with genuine GM power steering fluid. I'd probably go with a high quality type F as that is what the seals in the rack are compatible and I don't believe that it will cause an issue with the pump. Ford used a lot of Saginaw pumps running them with Type F fluid. What I am finding is DO NOT USE synthetic power steering fluids or fluids with any leak stop additives in them. The MII or 80's Mustang's racks seals don't seem to like either. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.