[Ramblin Reck]

Originally Posted by Admiral

I just use Sta-Lube GL4 gear oil in my '36. It's readily available on Amazon. I prefer the 85W90 oil as it shifts smoother and easier, however, I run the heavier 140W as it leaks less. I'm kicking myself for not installing O-rings on my car's transmission shafts.

Anyway, both of these lubes are rated GL-4, so they should be yellow-metal friendly... as far as I understand.

85W90 -- https://www.amazon.com/CRC-Sta-Lube-...3879714&sr=8-3

140W -- https://www.amazon.com/Sta-Lube-SL24...3879714&sr=8-4

Thanks!