What oil for an M15 trans?

[y5mgisi]

My 77 has the 3 speed "M15". Avery's thread got me wondering what oil i should be running in it. Any ideas?

 

[4by4bygod]

My 77 has the 3 speed "M15". Avery's thread got me wondering what oil i should be running in it. Any ideas?

80 - 90w gear oil, IIRC,

 

[y5mgisi]

does the gl-4/5 thing matter here?

 

[yellowK20]

shouldn't matter its old school

 

[y5mgisi]

good enough. Consider it filled with whatever i got on the shelf!