What kind of axle on -57 Gmc 1 ton? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bronx · 11-25-2005, 01:48 PM

Just wonder what kind of rear axle on my -57.

And this bumper must come from a bigger truck?

72addict · 11-27-2005, 08:15 PM

Not sure on the axle, but that tailgate sure is making me jealous !

**MJN** · 12-04-2005, 07:48 PM

thats an Eaton 10 bolt. hard to find parts for, some had No-Spin diffs in them. Got replaced by the 14 bolt in '73. Stong axle but the shafts only have 17 splines making them the weak point.

DennyB · 12-07-2005, 05:21 PM

Wouldnt that be the same rear as in the trucks up to 1972.
a ho5_something and a ho72? Does it have a drop out nodular front section?
If so it is the GM corporate-Eaton. Uasually come with a low gear (4.57s), 3.90s and down (higher number) are available for them.
It has a 14 bolt 10" ring gear and is a tough rear.
If thats a tag I see on the right bolt on the back cover that was a stock "no-spin" (locker) rear.
That is also a full floater version (bolts on outer bearing cover), As apposed to the semi floater version with the outer bearing pressed onto the axle.
They came in both coil and leaf spring versions.

DennyB · 12-07-2005, 05:22 PM

BTW, Good looking truck

**MJN** · 12-07-2005, 05:31 PM

If it's from a 1-ton truck it will either have 4:56 or 5:13 gears in it. No semi floaters were ever made in an eaton 10 bolt. yes they are the same rear as up to '72 trucks.

DennyB · 12-07-2005, 08:21 PM

Yea, they also used these alot in the 3/4 ton trucks.
I do think the width is different from the Task Force trucks from the later years too.
The 4:56 was not available in this rear, They were 4.57s...

11-25-2005, 01:48 PM	#1
bronx Registered User Join Date: Oct 2005 Location: norway Posts: 46	What kind of axle on -57 Gmc 1 ton? Just wonder what kind of rear axle on my -57. And this bumper must come from a bigger truck? Attached Images __________________ -57 GMC stepside -79 Bronco xlt -69 Opel Admiral -76 Opel commodore Last edited by bronx; 11-25-2005 at 01:49 PM.

11-27-2005, 08:15 PM	#2
72addict Registered User Join Date: Mar 2000 Location: Mason MI, 48854 (strikezone of the mitten) Posts: 894	Re: What kind of axle on -57 Gmc 1 ton? Not sure on the axle, but that tailgate sure is making me jealous ! __________________ 1957 Cameo

12-04-2005, 07:48 PM	#3
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	Re: What kind of axle on -57 Gmc 1 ton? thats an Eaton 10 bolt. hard to find parts for, some had No-Spin diffs in them. Got replaced by the 14 bolt in '73. Stong axle but the shafts only have 17 splines making them the weak point. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

12-07-2005, 05:21 PM	#4
DennyB Led Sled! Discs R 4 ME! Join Date: Jan 2001 Location: Toms River, NJ, USA (Transplanted Hoosier) Posts: 7,327	Re: What kind of axle on -57 Gmc 1 ton? Wouldnt that be the same rear as in the trucks up to 1972. a ho5_something and a ho72? Does it have a drop out nodular front section? If so it is the GM corporate-Eaton. Uasually come with a low gear (4.57s), 3.90s and down (higher number) are available for them. It has a 14 bolt 10" ring gear and is a tough rear. If thats a tag I see on the right bolt on the back cover that was a stock "no-spin" (locker) rear. That is also a full floater version (bolts on outer bearing cover), As apposed to the semi floater version with the outer bearing pressed onto the axle. They came in both coil and leaf spring versions. __________________ "Never ride faster than your Angel can fly" I.M.O.M,W,J&C Patriot Guard Rider

12-07-2005, 05:22 PM	#5
DennyB Led Sled! Discs R 4 ME! Join Date: Jan 2001 Location: Toms River, NJ, USA (Transplanted Hoosier) Posts: 7,327	Re: What kind of axle on -57 Gmc 1 ton? BTW, Good looking truck __________________ "Never ride faster than your Angel can fly" I.M.O.M,W,J&C Patriot Guard Rider

12-07-2005, 05:31 PM	#6
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	Re: What kind of axle on -57 Gmc 1 ton? If it's from a 1-ton truck it will either have 4:56 or 5:13 gears in it. No semi floaters were ever made in an eaton 10 bolt. yes they are the same rear as up to '72 trucks.

12-07-2005, 08:21 PM	#7
DennyB Led Sled! Discs R 4 ME! Join Date: Jan 2001 Location: Toms River, NJ, USA (Transplanted Hoosier) Posts: 7,327	Re: What kind of axle on -57 Gmc 1 ton? Yea, they also used these alot in the 3/4 ton trucks. I do think the width is different from the Task Force trucks from the later years too. The 4:56 was not available in this rear, They were 4.57s... __________________ "Never ride faster than your Angel can fly" I.M.O.M,W,J&C Patriot Guard Rider

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