The Ford Barn

Drbrown · 07-02-2016, 12:19 AM

I buy gallon-size StaLube GL-4 85-90w and straight 140w on-line from Amazon with free-shipping .... lowest cost I found. Local auto retailer's offered to order and don't seem to know much about the StaLube products.

rotorwrench · 07-02-2016, 09:02 AM

Some of the modern GL-5 lubricants have a sulphuric/chlorinated content that is more stable than was the previous sulphuric/chlorinated aditives so that they don't get too acidic while in use but they are still acidic. Yellow metal bearings might survive this but the roller sprag in a B&W overdrive won't. They used to use more lead compounds back in the early years but they halted that practice many moons ago.
https://en.wikipedia.org/wiki/Extreme_pressure_additive

07-02-2016, 12:19 AM	#21
Drbrown Senior Member Join Date: Oct 2013 Location: Glens Falls NY Posts: 1,267	Re: Transmission Fluid? I buy gallon-size StaLube GL-4 85-90w and straight 140w on-line from Amazon with free-shipping .... lowest cost I found. Local auto retailer's offered to order and don't seem to know much about the StaLube products.

07-02-2016, 09:02 AM	#22
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,426	Re: Transmission Fluid? Some of the modern GL-5 lubricants have a sulphuric/chlorinated content that is more stable than was the previous sulphuric/chlorinated aditives so that they don't get too acidic while in use but they are still acidic. Yellow metal bearings might survive this but the roller sprag in a B&W overdrive won't. They used to use more lead compounds back in the early years but they halted that practice many moons ago. https://en.wikipedia.org/wiki/Extreme_pressure_additive