Front Axle Identification chevy 3100 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DavidButler · 03-15-2018, 05:01 PM

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.

**1project2many** · 03-15-2018, 06:20 PM

Howdy,

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

3100:

3600:

DavidButler · 03-15-2018, 06:32 PM

Brilliant thanks, i'll check that out tomorrow.
Much appreciated.

whitedog76 · 03-15-2018, 08:20 PM

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

**mr48chev** · 03-16-2018, 12:14 AM

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.

DavidButler · 03-16-2018, 04:34 AM

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.

**mr48chev** · 03-16-2018, 12:08 PM

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.

Fred n' Ethel · 03-16-2018, 03:25 PM

Quote:

Originally Posted by mr48chev

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.

03-15-2018, 05:01 PM	#1
DavidButler Registered User Join Date: Mar 2018 Location: Wakefield Yorkshire Posts: 16	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.

03-15-2018, 06:20 PM	#2
1project2many Senior Member Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,217	Re: Front Axle Identification chevy 3100 Howdy, One way to tell is that 3/4 ton trucks have more robust steering arms. 3100: 3600:

03-15-2018, 06:32 PM	#3
DavidButler Registered User Join Date: Mar 2018 Location: Wakefield Yorkshire Posts: 16	Re: Front Axle Identification chevy 3100 Brilliant thanks, i'll check that out tomorrow. Much appreciated.

03-15-2018, 08:20 PM	#4
whitedog76 Registered User Join Date: Jan 2014 Location: Peoria, IL Posts: 1,450	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

03-16-2018, 12:14 AM	#5
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,838	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. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

03-16-2018, 04:34 AM	#6
DavidButler Registered User Join Date: Mar 2018 Location: Wakefield Yorkshire Posts: 16	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.

03-16-2018, 12:08 PM	#7
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,838	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. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.



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