The Ford Barn - View Single Post

Admiral · 10-10-2021, 10:34 AM

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

10-10-2021, 10:34 AM	#2
Admiral Senior Member Join Date: Jul 2011 Location: Oakland County, Michigan Posts: 562	Re: 1939 Ford Transmission Gear oil 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