GL-4 only for the gearbox. Yes it can be hard to find.

GL-5 that claims to be compatible with brass or yellow metals will still cause excessive wear to the synchros. They claim compatibility because it's not corrosive to those metals so can be used with brass components. That is true in itself, but if those brass components are synchros they will still wear excessively due to the way the EP GL-5 oil works. Don't use any GL-5 in the gearbox. GL-5 is designed for use with steel gears only.

Use GL-5 for the diff.

GL4 is guaranteed to work with brass parts

GL5 may be compatible, or may not be. Check the label for GL5 "compatible with brass"

Quote:I would use a new gasket without any glue or sealer

Hi!

In my country i only found Barhdal or Champion ETC 80-90 GL5? i cant find gl4 it is dificult

Acording with that i read gl5 will destroy brase synchronizers

Thanks

Luis

From the Datsun 1200 Owner's Manual

* GL-4
* 75,80,90, 80-90 or 140 weight

Please give me some help, i will change gearbox and diff oils

if im correct let me know

Gear box GL4 80-90
and about diff??? can i use the same oil gl4 80-90?

I have 3 liter tranself 80w can i use on dif and gearbox? I will have some consequences? Or its better buy GL4 80-90 to gearbox and diff?

Another question i have a small leak on inner oil pump gastet, i have order a new one from bprojects, can i surface the oil pump surfaces and add seal gasket to fix the inner oil pump gasket? or clean the surfaces and add the new gasket without any glue