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Joined: Aug 2023
Posts: 43 Likes: 4
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Aug 2023
Posts: 43 Likes: 4 |
I’m confused on what type of transmission oil I should use in my 1948 Fleetmaster Woodie. Looking at some of the oil specs they say not for use in non-synchronized transmissions. What’s the difference? Any guidance is appreciated.
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Joined: Dec 2019
Posts: 1,139 Likes: 75
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Dec 2019
Posts: 1,139 Likes: 75 |
Hi Buckaroo
The big brand name GL-5 transmission/differential oils have been buffered and thus usable in all manual transmissions and differentials for many decades now.
So, any good GL-5 80W-90 will be fine and easily found.
Way way way back, "extreme pressure" oils made for hypoid differentials would attack brass/bronze bushings and washers.
That hasn't been the case for many decades now so don't worry about it.
I've been using GL-5 oil in everything for over 50 years now without a problem... and many of our transmissions have been around for all of those 50 years. 🙂
Ole S Olson
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Joined: Mar 2017
Posts: 201 Likes: 2
Backyard Mechanic
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Backyard Mechanic
Joined: Mar 2017
Posts: 201 Likes: 2 |
Tractor Supply sells a transmission gear line for older Ford tractors that is a GL-1 SAE 90 that won’t damage brass. The name is Traveller and sold in two gallon containers. I’ve been using it for the past few years.
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Joined: Dec 2019
Posts: 1,139 Likes: 75
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Dec 2019
Posts: 1,139 Likes: 75 |
As stated above
GL-5 will NOT damage brass, and it's a far better oil in all regards.
Last edited by Stovblt; 09/25/23 10:36 AM.
Ole S Olson
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
I agree 100% with the above.
Gene Schneider
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