Gear Oil Formulation 

Interesting. Yes complexity cause of different applications. Just like in a manual transmission with synchros. Some manufacturers will just recommend a special synchro fluid, a Gl-4 rated or one that is GL-4/5. Not so much of being corrosive to synchros but I know each fluid has different frictional properties that could effect synchro performance. JMHO

Thank u sir

Is GL 4 or GL5 gear oil good for the gear box and clutch system of two stroke bikes?

Good show :) Pl explain SN & Bright stock?

pl explain about fzg tests

How does ATF fluids do in a gear box, like rear diff's in 4 wheelers, are they good for light gear work??

You know what would be nice; is if oil manufacturers had a lube guide, but instead of one for already made uses it would be for custom applications. A drop down box, materials, bearings, clearances, temperature, speed, types of gears, type of lubrication etc. My gear box design is all steel gears with ball bearings and also chain drive (either silent or roller) some gears are high speed and load load others are high load and low speed. Am hoping to use the input gear as also the oil pump for oil squirters as it needs to lift oil 40cm and then trickle down. SO much design, but it is fun. Learning is the never ending puzzle.

Pshh everyone knows worm gears need compounding with whale oil, about 20% co-base should do. It makes the oil "oilyer" for all that sliding. Also applicable to steam cylinders. (Actual old time info I picked up somewhere, though not word of mouth it was from an old engineering paper.)