Hi, I am sure there are some opinions that will be differ from mine but if I did not see any water or contaminates in it I would leave it alone. I removed some of that 400-600 weight tar out of a tractor to put nice clean oil in it and I ended up with noise that was not there before. Just my 2 cents😊 Larry
a new 90w oil is much too thin and will cause leakage aswell, so look for the 300 w oil.
Ok thanks for the info
Back in the Spring/Early Summer there was a Thread on the "GL" grades of Gear Oil, seems that if you do want to put in modern lubricant. Then you need to find the lower "GL" type with less phosphorus(?) as this will pit Bronze bushings.
I use "Sta-Lube multi-purpose SAE 140 Hyoid Gear Oil API/GL4". It is not corrosive to copper, bronze or other non-ferrous alloy bearings and bushing. Bill
You put that in both tranny and final drive?
Yes, the transmission and final drives use the same type oil.
OK thanks again. I uploaded a picture, hopefully it worked. I have fixed the seat since the picture.
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