The Ford Barn

jack99 · 10-25-2014, 04:15 PM

What is the correct weight gear oil for a 1935 Ford V8 transmission? Should I use the same "600W" that I use in my model A or something different? Thanks for your input.

JSeery · 10-25-2014, 04:19 PM

Believe 600W is a type of oil, not an oil weight.

CT AV8 · 10-25-2014, 04:49 PM

Quote:

Originally Posted by jack99

What is the correct weight gear oil for a 1935 Ford V8 transmission? Should I use the same "600W" that I use in my model A or something different? Thanks for your input.

Jack, I have a '35 transmission in my AV8 and I use the same 600W from Bratton's that I did with the Model A transmission. I'm happy with it.

Planojc · 10-26-2014, 07:53 AM

That's what I use in my 35 and my Model A's.

JSeery · 10-26-2014, 08:50 AM

http://www.bobistheoilguy.com/viscosity-charts/

600W is an ISO rating I believe which would be about 140W SAE. 600W gear oil is not 600 wt oil in the commonly used ratings of today, it is the equivalent to 140 wt gear oil. Attached is a scan from a Brattons catalog (from an earlier Barn post).

rotorwrench · 10-26-2014, 09:56 AM

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600 steam cylinder oil predates the SAE ratings. It dates back to the 19th century. The owners manuals for the early Ford V8 cars should have SAE rated lubricants like straight grade GL-1 oils. 600W was listed for Model A car steering boxes but I don't think FoMoCo recommended it in the V8 era. SAE 80, 90, and 140 have all been used for lubricants plus the soda soap oil for U-joints.

Steering gears can use anything you can pour in there as long as the seal is good. Folks always go back to the 600W/600 or STP when they have a leak they don't care to repair.

supereal · 10-26-2014, 01:32 PM

The "600 weight" oil is basically a thin asphalt solution that was devised to try to contain leakage in Model T and A vehicles that had little or no effective sealing. It should NOT be used in later transmissions or rear ends. If your transmission is not badly worn, the 80-90 weight gear oil is recommended. A leaky gear box or rear end would benefit from using 140 weight gear oil, unless you drive in a cold climate. Both have "high pressure" additives, and are light years ahead of the archaic "oils" such as 600W.

10-25-2014, 04:15 PM	#1
jack99 Senior Member Join Date: May 2010 Location: Bridgehampton, NY Posts: 125	Correct gear oil for 1935 Ford What is the correct weight gear oil for a 1935 Ford V8 transmission? Should I use the same "600W" that I use in my model A or something different? Thanks for your input.

10-25-2014, 04:19 PM	#2
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: Correct gear oil for 1935 Ford Believe 600W is a type of oil, not an oil weight.

10-26-2014, 07:53 AM	#4
Planojc Senior Member Join Date: May 2010 Location: Plano, Texas Posts: 841	Re: Correct gear oil for 1935 Ford That's what I use in my 35 and my Model A's.

10-26-2014, 09:56 AM	#6
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,425	Re: Correct gear oil for 1935 Ford Sponsored Links (Register now to hide all advertisements) 600 steam cylinder oil predates the SAE ratings. It dates back to the 19th century. The owners manuals for the early Ford V8 cars should have SAE rated lubricants like straight grade GL-1 oils. 600W was listed for Model A car steering boxes but I don't think FoMoCo recommended it in the V8 era. SAE 80, 90, and 140 have all been used for lubricants plus the soda soap oil for U-joints. Steering gears can use anything you can pour in there as long as the seal is good. Folks always go back to the 600W/600 or STP when they have a leak they don't care to repair.

10-26-2014, 01:32 PM	#7
supereal Senior Member Join Date: Jul 2014 Location: Iowa Posts: 1,634	Re: Correct gear oil for 1935 Ford The "600 weight" oil is basically a thin asphalt solution that was devised to try to contain leakage in Model T and A vehicles that had little or no effective sealing. It should NOT be used in later transmissions or rear ends. If your transmission is not badly worn, the 80-90 weight gear oil is recommended. A leaky gear box or rear end would benefit from using 140 weight gear oil, unless you drive in a cold climate. Both have "high pressure" additives, and are light years ahead of the archaic "oils" such as 600W.