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EFV-8 Club Forum / General Ford Discussion / 1936 Transmission Oil Question

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Discussion Topic: 1936 Transmission Oil Question -- page: 1 2

Ketronj281989

08-14-2020 @ 3:55 AM

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As I continue to gather materials for my Fall service so I may lightly drive the car before winter (projected goal) I am stocking up on needed oils.

The transmission oil is my next question. The car reference manual for 1936 states the gear oil summer S.A.E Viscosity is 160, winter 90-110.

Are these weights still obtainable on todays market? What are your recommendations. I included the lubrication chart I have been looking over.

Thanks,

Jon

nelsb01

08-14-2020 @ 5:49 AM

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Your going to get a lot of different ansuers, but the thing to remember is that you have to look for oil that has a rating of GL-3 or less. Reason for this is the higher number GL does not protect your brass parts in the transmission.
I have found Traveler brand at Tractor Supply with a GL rating of GL-1. It also states on the gallon jug that is for Ford Tractors.
It is SAE 90.
Hope this helps.

carcrazy

08-14-2020 @ 11:07 AM

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You can also purchase SAE 90W Mineral Gear Oil API GL-1 at your local NAPA store. It is available in 1 gallon containers under part number 65-201. If the store doesn't have it in stock, they can order it for you and have it in about a day.

fenbach

08-14-2020 @ 7:56 PM

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GL-3, 75W-90 tranny oil. see

https://slingshot.polaris.com/en-us/shop/maintenance/lubricants/2879440/

or

https://www.walmart.com/ip/Polaris-Slingshot-New-OEM-Transmission-Oil-Lubricant-75w-90-32oz-Quart-2879440/298371557

i found some at a jet ski dealer.

Ketronj281989

08-17-2020 @ 5:24 AM

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Gentleman,

Thank you for your replies. Appreciate all the info and will look into these suggestions further.

Jon

flatheadron

08-23-2020 @ 8:48 AM

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There are a number of areas that I would like to qualify about transmission oil changes before I make my recommendation. First, Ford's recommendation is very vague. The reference to "summer" and "winter" leaves a lot to be desired and was written at a time when these cars were used as everyday transportation. Winter is usually defined as temperatures below 32 degrees F. And the recommendation is for the average temperatures during the period is consistently below 32F. I do not know what area you are in but I find it hard to believe you will be driving your car in that cold of weather. I believe you would be fine using the "summer" oil during the period of time you will be driving your car. Now to the viscosity. Today you will not find SAE160 gear oil. SAE 140 is what we will find today. You may be able to find a multi-viscosity fluid like 90W-140 that would give you the properties you need for both summer and winter use. The recommendations of the others is vey correct, you want a fluid that has an API rating of GL-1 or GL-3. These are basically mineral based oils with no hypoid additives in them. Stay away from fluids labeled GL-4 or GL-5. They contain increasing higher levels of sulfur based additives that are required for hypoid rear axles but can do long term damage to brass parts like the synchronizer rings in a manual transmission.

39 Ken

08-24-2020 @ 7:36 AM

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With respect, GL-4 is NOT harmful to yellow metals in our transmissions.

I use CRC GL-4 in my cars. Having said that, I believe GL-4 from any manufacturer
conform to the basic specs required for this oil and won't harm yellow metal.

Here is an out take from Penn Grade information on their GL-4 gear oil.

" Gear Oil GL-4 SAE 80W-90 is a specially blended using high quality premium mineral base stocks and select additive technologies. It is designed to be used with “yellow” metallurgy (brass, bronze, copper) and other ‘soft’ metals used in synchronizers, bushings, thrust washers and other components typically found in classic manual transmissions and transaxles."

Ken

supereal

08-25-2020 @ 1:32 PM

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Heavier oil reduces the leakage present on most old Fords. It can affect shifting in cold weather when most of us put the vehicle in dry dock waiting for the return of spring. Remember the old Ford saying "If it ain't leaking, it probably needs fixing".

Ketronj281989

08-28-2020 @ 4:04 AM

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Thank you both for your replies, much appreciated.

Jon

Jon Ketron
1936 Ford V8 Deluxe Tudor Touring Sedan

Ketronj281989

08-28-2020 @ 4:10 AM

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A lot of what's currently available on the market is 80W-90. Would this be an ok weight to use in the transmission? Would it act as well as an heavier oil? Would it change the characteristics of shifting due to the lighter oil weight?

Thank you,
Jon

Jon Ketron
1936 Ford V8 Deluxe Tudor Touring Sedan

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