I'm seeing varying opinions about Eaton 2 speed rear end lubrication. I have a 1980 Ford LN800 with a single axle 2-speed electric rearend. I see in the manual that it has a couple of clutches within the assembly. Does this rearend need a friction additive such as sta-lube added? Also, do I need to find 80w-90 GL4 for it? Thanks for any advice.

 

https://www.doverbrakeinc.com/downlo...02%20SPEED.pdf

Short version: MIL-L-2105D

This stuff meets the spec:

https://www.valvolineglobal.com/en-n...etic-gear-oil/

 

Thank you!!