hard shifting 833

340mopar said

GL-5 lubricant can be and some specify that it be used in a transmission, here is a link to Valvoline gear oils.
http://www.valvoline.co.nz/prod0111.htm

But this isn't really the issue. The factory manuals recommended ATF years ago and the gear boxes haven't evolved into some other kind of tranny they are still the same trannys as when the manuals were written.

Click to expand...

Actually, it is. Some recent formulations are specc'ing dual-rated GL4/5 by using new tech adds that are now supposed to be compatible with the yellow metals (syncros) commonly found in manual transmisisons. Of course the trans doesn't change, but the lubes available for it do. And they are getting better all the time. You just have to be careful about what you put in there, because there is a very wide range of stuff available out there today. Getting the wrong fluid in there is easier to do. It's not just a choice of either ATF or gear lube anymore.