Help finding EATON 1350 2 speed Differential
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Laughing Gas
Joined: Nov 2015
Posts: 950
Likes: 73
From: San Diego
Help finding EATON 1350 2 speed Differential
All, My tool truck is down. When I removed the Castle nut to replace the leaking pinion seal the nut came off very easily that is because the threads on the Pinion Drive are gone. Therefore I need a ring and pinion. This one is the 5.83/811 gear with the Ring having 35 teeth. That is what I want to retain so I still have freeway speed. If no ring and pinion is available...I will of course go for a full carrier or even a full drum to drum differential....anyone have one that I can buy? Any leads or suggestions are welcome...Does anyone know where/if I can have this pinion's threads repaired? Eaton 1350 2 speed.
Logistics Pro
Joined: Sep 2014
Posts: 4,920
Likes: 21
From: Bothell & Silverdale, WA
Try this
I think it's a long shot, but you can try https://www.randysworldwide.com/ and Chuck's Trucks https://www.chuckstrucksllc.com/
Logistics Pro
Joined: Feb 2005
Posts: 3,952
Likes: 117
From: Upper Left Coast
All, My tool truck is down. When I removed the Castle nut to replace the leaking pinion seal the nut came off very easily that is because the threads on the Pinion Drive are gone. Therefore I need a ring and pinion. This one is the 5.83/811 gear with the Ring having 35 teeth. That is what I want to retain so I still have freeway speed. If no ring and pinion is available...I will of course go for a full carrier or even a full drum to drum differential....anyone have one that I can buy? Any leads or suggestions are welcome...Does anyone know where/if I can have this pinion's threads repaired? Eaton 1350 2 speed.
You might try finding a machine shop like Axle & Spindle Repair, Bent & Worn Bearing Areas, Seals, Threaded Areas, Complete Spindle repair and Installation at your location or similar. A good machine shop *should* be able to weld the thread area, heat/treat and machine new threads. Also, it might be possible to machine to the next size smaller (metric) threads (which might only be slightly smaller)
Otherwise, my money would be on finding a newer 2-speed axle that might still have the same spindle dimensions (so you could use your current hubs)
Failing that, I would simply go to the newer axle that was put in F-600s in 1956-60.
That would probably require going to 6-lug hubs and wheels but that would be a good thing because you'll find more wheel choices. If you want to have the same on the front, you could go to a newer front axle too.
I think this might be the best choice.......and if you have not already gotten new wheels and tires, now might be the time to switch (then you can find new Alcoa 6-lug 22.5s for it!!)
I was in the same boat back in about 2005 when I discovered that my ring gear was severely rusted. Fleetpride in Seattle found me a used (but good) complete 2-speed pumpkin for $750. They also found a new (old-stock) ring and pinion but the price was ridiculous (and simply NOT worth it!)
1 choice is to find another truck with a usable rear axle. Those are not only hard to find but every one I found had water in the differential. (and RUST) It's amazing how many are out there but at 60-70 year old stuff is rarely in good shape!!
1st Gear
Joined: Dec 2023
Posts: 1
Likes: 0
All, My tool truck is down. When I removed the Castle nut to replace the leaking pinion seal the nut came off very easily that is because the threads on the Pinion Drive are gone. Therefore I need a ring and pinion. This one is the 5.83/811 gear with the Ring having 35 teeth. That is what I want to retain so I still have freeway speed. If no ring and pinion is available...I will of course go for a full carrier or even a full drum to drum differential....anyone have one that I can buy? Any leads or suggestions are welcome...Does anyone know where/if I can have this pinion's threads repaired? Eaton 1350 2 speed.
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