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Old 03-15-2018, 05:01 PM   #1
DavidButler
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Front Axle Identification chevy 3100

Can anybody advise me how I can tell from the front axle and spindles only ( no drums or rotors present)whether I have a 3100 (1/2 ton) or 3600 (3/4 ton) axle on my truck.
I need to buy a set of rotors but It looks as though the front axle has been swapped before I bought it. Hopefully for another 3100 truck axle.
My truck is a 1952 3100 pickup.
Any help would be really appreciated.
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Old 03-15-2018, 06:20 PM   #2
1project2many
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Re: Front Axle Identification chevy 3100

Howdy,

One way to tell is that 3/4 ton trucks have more robust steering arms.

3100:


3600:
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Old 03-15-2018, 06:32 PM   #3
DavidButler
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Re: Front Axle Identification chevy 3100

Brilliant thanks, i'll check that out tomorrow.
Much appreciated.
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Old 03-15-2018, 08:20 PM   #4
whitedog76
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Re: Front Axle Identification chevy 3100

Measure the diameter of the spindle. The 53-59 3600 trucks used a 1.49” inner bearing. The 47-52 used a 1.4” bearing
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Old 03-16-2018, 12:14 AM   #5
mr48chev
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Re: Front Axle Identification chevy 3100

Scroll down to page 128 and it gives the differences between the axle. https://www.gmheritagecenter.com/doc...olet-Truck.pdf

After seeing that you should be able to tell with a quick tape measure check.
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48 Chev 3100 that will run a 292 Six.
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Old 03-16-2018, 04:34 AM   #6
DavidButler
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Thumbs up Re: Front Axle Identification chevy 3100

Thanks for all three reply's.
I snuck in the Garage this morning before setting off to work and confirmed I do have a 3100 axle and spindles. Brilliant.
Thanks so much for taking the time to help.
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Old 03-16-2018, 12:08 PM   #7
mr48chev
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Re: Front Axle Identification chevy 3100

I learned something when I looked that up. I knew that there was a difference in the axles but didn't know what the exact difference was.
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If you can't fix it with a hammer, you have an electrical problem.

My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
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Old 03-16-2018, 03:25 PM   #8
Fred n' Ethel
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Re: Front Axle Identification chevy 3100

Quote:
Originally Posted by mr48chev View Post
I learned something when I looked that up...........
So did I ! That is a link to a fantastic resource ! Thanks very much for posting it ! Lotta great info there.
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