This is the Eneos I put in my manual trans. which calls for either GL 4 or 5. I think it has changed from the older Eneos talked about before. It seems to say for synchromesh is ok because they use less ep additives due to the advanced synthetic oil. Wonder what the gear oil experts think. It shifts very well with it.
https://www.eneos.us/product/eneos-gear-oil-lsd/
https://www.eneos.us/product/eneos-gear-oil-lsd/