The Ford Barn - Correct gear oil for 1935 Ford

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jack99

10-25-2014 04:15 PM

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.

JSeery

10-25-2014 04:19 PM

Re: Correct gear oil for 1935 Ford

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

CT AV8

10-25-2014 04:49 PM

Re: Correct gear oil for 1935 Ford

Quote:

Originally Posted by jack99 (Post 968940)

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

Re: Correct gear oil for 1935 Ford

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

JSeery

10-26-2014 08:50 AM

Re: Correct gear oil for 1935 Ford

1 Attachment(s)

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

Re: Correct gear oil for 1935 Ford

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

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.

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