See
http://jdparts.deere.com/partsmkt/document/english/expert/featbene/DKE7413OilSalesGuide11-02.pdf
page 9 of 52 for conversions from Mil-L civilian specs. Mil-l-46152 and the gear lube specs you mentioned in your other post are obsolete specs and are nothing special, so you will have a wide variety of modern lubes to choose from.
Here's my so-so attempt to quote the table on p 9 of 52. The civilan spec appears right after the Mil spec.
The Mil spec oils typically meet more civilian specs than are listed in the following table. A recent Mil-L-2104x or Mil-PRF-2104x most likely will also meet SJ, SL or whatever API gas engine spec was in effect at the time
****
"In 1941, the military began qualifying engine oils.
The U.S. Army 2104 specification was issued that
year to cover oils meeting both Caterpillar and
General Motors requirements. The military has
continued to evaluate and classify engine oils as
engines became more sophisticated. Caterpillar
engine tests have continued to be the backbone of
any diesel engine oil evaluation program for the
military.
Military specifications also include gasoline
engine tests to evaluate the effect of engine oil
quality on bearing corrosion, engine wear and
engine deposits such as rust, sludge and varnish.
Recent changes in military procurement
regulations now allow the purchase of
lubricants meeting applicable industry
specifications for use in most military
equipment.
MILITARY SPECIFICATIONS API
Current specifications “Equivalent”
CIDA-A-52306 CG-4
Non-current specifications
U.S. Military MIL-L-2104F CF-4
U.S. Military MIL-L-2104E CE/SG
U.S. Military MIL-L-2104D CD/SF
U.S. Military MIL-L-2104C CD/SC
U.S. Military MIL-L-2104B CD/SC
U.S. Military MIL-L-46152E SG
U.S. Military MIL-L-46152D SG
U.S. Military MIL-L-46152C SF
U.S. Military MIL-L-46152B SF/CC
U.S. Military MIL-L-46152A SE/CC
U.S. Military MIL-L-45199B CD"
P 17 mentions the gear lube you asked about
"MIL-L-2105
This has been a long-standing performance level of
gear oils determined by test sequences which define
MIL-L-2105 Standards. Products meeting this
specification are of the API GL-4 type.
While the specification MIL-L-2105 is now
obsolete, replaced by the current specification
MIL-PRF-2105E, it is still widely used to indicate
a performance level for some gear oils."
