Transmission Fluid Question

[Jon Davis]

Vinson Mok wrote:

> Apparently, from the technical pappers that I have read, GL-5 oil that's
not
> GL-4 rated can cause spalling of transmission/bearing surfaces.  That is

GL-5 does not cause spalling on steel (note the EP rating). GL-5 actually
protects steel better than GL-4 because it has extra additives that form a
chemical layer on the surface of the steel, preventing metal-to-metal
contact better. The only reason not to use it in manual trannies is the
corrosion of bronze.

Jon Davis