GL-4 or GL-5 for Transfer Case

[fixkick]

Synchromesh Transmission Fluid(GM Part No. U.S. 12345349, inCanada 10953465).

this is the GM spec for GL4 (used by Suzuki in the CAMI plant in Canada)

note the same numbers here

https://www.pennzoil.com/en_us/products/...fluid.html

Axle Lubricant(GM Part No. U.S. 12345977, ini Canada 10953482) orSAE 80W-90 GL-5 gear lubricant.

977 is it ,
https://www.redlineoil.com/75w90-gl-5-gear-oil

https://www.amazon.com/dp/B007WVI5G6?tag...th=1&psc=1

GL5 yes, GL4 no.
https://www.amazon.com/dp/B000IG20RC?tag...th=1&psc=1

off the shelf here in town.
GL4/5 in one jug., amazing, no?

https://www.walmart.com/ip/Valvoline-Hig...t/23325574

texas Ashland oil. via Valvoline. ( my my guess is special new EP , additives used allow that)