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Old 01-20-2025, 06:56 AM   #1
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Dana 80 John Deere 1989 Outer axle nut

Hello,
i have a John Deere chassis from 1989 with a Dana80 axle.
Do any of you know how many inches or mm the nut for the outer axle nut is?


I need to replace the brake callipers and brake discs.


thanks
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Old 01-20-2025, 08:53 AM   #2
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If memory serves from working on Dodge trucks of that vintage ; 2 9/16"

Shop had a special thin wall socket for the task.
OTC was the tool supplier.

EDIT : Amazon lists the OTC socket ( 2 9/16 ) for the Dana 60 series ( that could be what I'm thinking of ) , and has other OTC sockets form 2 3/4" UP .
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Old 01-20-2025, 09:19 AM   #3
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Note there are adjustable tools for those spindle nuts ( shop had one of those as well ) and an auto parts store may have one you could rent .

Site computer won't accept the image I have of the adjustable tool ( invalid file )

EDIT: BTW , correct name is " spindle nut " , if your searching for axle nut tool you'll probably only find the axle flange nut size and those you already have off.
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Old 01-20-2025, 09:26 AM   #4
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Note there are adjustable tools for those spindle nuts ( shop had one of those as well ) and an auto parts store may have one you could rent .
I am from Germany, I cannot rent us tools here. That's why I need the exact size.
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Old 01-20-2025, 09:32 AM   #5
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I am from Germany, I cannot rent us tools here. That's why I need the exact size.

Understand your issue , I know I've had those apart from the days when Dodge built class A motor home chassis , using the 80 series axle .

I'll look for the exact size.
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Old 01-20-2025, 09:37 AM   #6
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Understand your issue , I know I've had those apart from the days when Dodge built class A motor home chassis , using the 80 series axle .

I'll look for the exact size.

thanks
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Old 01-20-2025, 09:45 AM   #7
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Fill the gap between the nut flat and the hub with some round stock. Then turn the hub to loosen the nut. The round stock will wedge in the gap.
Once it's off, take it to the store.
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Old 01-20-2025, 09:54 AM   #8
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I found a U tube video title ;

" How to replace Dana 80 Axle bearing step by step "

Video shows a " Power Built 2 1/2 " 6 point socket in use .
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Old 01-20-2025, 09:54 AM   #9
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Fill the gap between the nut flat and the hub with some round stock.

Just deep enough to hold only the outer nut.


I like that. I hadn't seen it before, and I learned from a bunch of old guys.
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Old 01-20-2025, 12:15 PM   #10
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Quote:
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I found a U tube video title ;

" How to replace Dana 80 Axle bearing step by step "

Video shows a " Power Built 2 1/2 " 6 point socket in use .

yes i know the video, but it's not like mine


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Old 01-20-2025, 03:02 PM   #11
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Worst comes to worst, just measure it.
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Old 01-20-2025, 05:53 PM   #12
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Is that hub damaged? The inside should be bored out and round, but it looks like there are 3 flats? Do you have a vibration when driving?
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Old 01-21-2025, 01:34 AM   #13
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Is that hub damaged? The inside should be bored out and round, but it looks like there are 3 flats? Do you have a vibration when driving?

No vibrations, this is the aluminum seal that looks a bit bulging

the picture is from 7 years ago when i changed the simmerrings/seal.
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Old 01-21-2025, 01:38 AM   #14
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Worst comes to worst, just measure it.
I need to know the dimension beforehand. Before I pull the axle. I'm on the road.
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