Unusual Axle shaft? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Todd46** · 12-18-2019, 11:10 PM

Hey guys, I need some help on this!
Took my 62 C10 in for new gears (3.38). Good news, found out it's a factory posi bad news needed a new axle shaft. Got a shaft and when I took it in we noticed that the end by the c-clip is thicker on mine than the replacement I found. Looked at another shaft and same thing the end is thinner. Any ideas?
The original shaft is on the top. Thanks

**PGSigns** · 12-19-2019, 02:22 PM

So what rear is in the truck? Eaton or 12 bolt?
Jimmy

MikeN · 12-19-2019, 03:47 PM

If total length of the shaft is the same (seats tightly against the center retaining pin when installed) I don't think it should matter.

**Todd46** · 12-19-2019, 04:09 PM

Quote:

Originally Posted by PGSigns

So what rear is in the truck? Eaton or 12 bolt?
Jimmy

It is an Eaton
Posted via Mobile Device

**Todd46** · 12-19-2019, 04:12 PM

Quote:

Originally Posted by MikeN

If total length of the shaft is the same (seats tightly against the center retaining pin when installed) I don't think it should matter.

It was a bit shorter. The shop was concerned about travel.
Posted via Mobile Device

MikeN · 12-19-2019, 04:55 PM

Quote:

Originally Posted by Todd46

It was a bit shorter. The shop was concerned about travel.
Posted via Mobile Device

Yeah, that doesn't sound right.

**Captainfab** · 12-19-2019, 10:47 PM

Is the replacement axle from a Eaton HO32/33 or from a '63/'64 12 bolt?

**Todd46** · 12-19-2019, 11:12 PM

It was supposed to be from a 60-62 Eaton. I got it from Aspen in AZ.
I'll call my local yard. They came up with the same type. I'll push for specific details.

**PGSigns** · 12-20-2019, 07:54 AM

Where did you find a new gear for the Eaton? I did not know that anyone was making gears for them. Post a picture of what is in the truck. You just never know with these trucks what may have been changed. The thickness of the spud after the C clip is very important that it is the correct thickness. That is what seats the C clip into the spider gear when the cross pin is installed. To thick and the pin will not go in, to thin and the C clip can come out. Your old axle looks like a 17 spline 12 bolt not an Eaton. That may be why the replacement does not look correct it may be for an Eaton.
Jimmy
Jimmy

**Todd46** · 12-20-2019, 10:24 AM

Thanks Jimmy, I'll try and find a 12 bolt shaft and see what it looks like.
Those were in the 64-66 trucks?

shortstep60 · 12-20-2019, 11:26 AM

I think you need one out of a 63-64 I have one and it’s just like yours and it’s out of a 63

**Todd46** · 12-20-2019, 01:40 PM

Quote:

Originally Posted by shortstep60

I think you need one out of a 63-64 I have one and it’s just like yours and it’s out of a 63

Posted via Mobile Device

**Todd46** · 12-20-2019, 01:41 PM

Quote:

Originally Posted by Todd46

Posted via Mobile Device

How far away are you? I’m in central California
Posted via Mobile Device

**Todd46** · 12-20-2019, 01:41 PM

Quote:

Originally Posted by PGSigns

Where did you find a new gear for the Eaton? I did not know that anyone was making gears for them. Post a picture of what is in the truck. You just never know with these trucks what may have been changed. The thickness of the spud after the C clip is very important that it is the correct thickness. That is what seats the C clip into the spider gear when the cross pin is installed. To thick and the pin will not go in, to thin and the C clip can come out. Your old axle looks like a 17 spline 12 bolt not an Eaton. That may be why the replacement does not look correct it may be for an Eaton.
Jimmy
Jimmy

Posted via Mobile Device

**Todd46** · 12-20-2019, 01:44 PM

I’ll try and get a picture. The shop found the gears for me. 3.38 are the only ones available. I’ll ask where they got them. There is also a guy that goes by mothertruckeraz who has gears for older trucks.
Posted via Mobile Device

61K10 · 12-20-2019, 03:56 PM

mine said yukon gear& axle on the box, who knows who made them.

**Todd46** · 12-26-2019, 12:54 AM

Quote:

Originally Posted by PGSigns

Where did you find a new gear for the Eaton? I did not know that anyone was making gears for them. Post a picture of what is in the truck. You just never know with these trucks what may have been changed. The thickness of the spud after the C clip is very important that it is the correct thickness. That is what seats the C clip into the spider gear when the cross pin is installed. To thick and the pin will not go in, to thin and the C clip can come out. Your old axle looks like a 17 spline 12 bolt not an Eaton. That may be why the replacement does not look correct it may be for an Eaton.
Jimmy
Jimmy

Here's a photo of the differential cover

**mongocanfly** · 12-26-2019, 01:23 AM

Its definitely not a 12bolt...like above ..maybe ho 32 or 33..
I'm not sure..I think Eaton but at the end of this post the guy says Eaton has bolts close together...http://67-72chevytrucks.com/vboard/s...d.php?t=426871

Then this...http://67-72chevytrucks.com/vboard/s...d.php?t=702889

**Captainfab** · 12-26-2019, 10:43 PM

That is the Eaton HO32/33 which would be original to the truck.

sstock · 12-27-2019, 12:23 AM

Quote:

Originally Posted by Todd46

It was a bit shorter. The shop was concerned about travel.
Posted via Mobile Device

What is a bit shorter? Measure to the 1/32" about .030 of an inch or you are not going to get an answer that counts. You cant play horseshoes here. You just may need a thicker C clip

shortstep60 · 12-27-2019, 12:25 AM

If you can’t find a axle I have a couple of those rear ends

**Todd46** · 01-07-2020, 01:23 AM

Quote:

Originally Posted by PGSigns

Where did you find a new gear for the Eaton? I did not know that anyone was making gears for them. Post a picture of what is in the truck. You just never know with these trucks what may have been changed. The thickness of the spud after the C clip is very important that it is the correct thickness. That is what seats the C clip into the spider gear when the cross pin is installed. To thick and the pin will not go in, to thin and the C clip can come out. Your old axle looks like a 17 spline 12 bolt not an Eaton. That may be why the replacement does not look correct it may be for an Eaton.
Jimmy
Jimmy

Here's a picture of the posi rear. It is an Eaton and now has 3.38 gears in it. Hope to get the axle tomorrow

**mongocanfly** · 01-07-2020, 04:36 AM

unless I'm missing something ,that's a open diff...not a posi

**Todd46** · 01-23-2020, 12:05 AM

Quote:

Originally Posted by PGSigns

Where did you find a new gear for the Eaton? I did not know that anyone was making gears for them. Post a picture of what is in the truck. You just never know with these trucks what may have been changed. The thickness of the spud after the C clip is very important that it is the correct thickness. That is what seats the C clip into the spider gear when the cross pin is installed. To thick and the pin will not go in, to thin and the C clip can come out. Your old axle looks like a 17 spline 12 bolt not an Eaton. That may be why the replacement does not look correct it may be for an Eaton.
Jimmy
Jimmy

The gears were made by Yukon Performance

12-18-2019, 11:10 PM	#1
Todd46 Registered User Join Date: Oct 2019 Location: Clovis Posts: 33	Unusual Axle shaft? Hey guys, I need some help on this! Took my 62 C10 in for new gears (3.38). Good news, found out it's a factory posi bad news needed a new axle shaft. Got a shaft and when I took it in we noticed that the end by the c-clip is thicker on mine than the replacement I found. Looked at another shaft and same thing the end is thinner. Any ideas? The original shaft is on the top. Thanks Attached Images

12-19-2019, 02:22 PM	#2
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Unusual Axle shaft? So what rear is in the truck? Eaton or 12 bolt? Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

12-19-2019, 03:47 PM	#3
MikeN Registered User Join Date: Oct 2007 Location: Marietta, GA Posts: 805	Re: Unusual Axle shaft? If total length of the shaft is the same (seats tightly against the center retaining pin when installed) I don't think it should matter.

12-19-2019, 10:47 PM	#7
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Unusual Axle shaft? Is the replacement axle from a Eaton HO32/33 or from a '63/'64 12 bolt? __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

12-19-2019, 11:12 PM	#8
Todd46 Registered User Join Date: Oct 2019 Location: Clovis Posts: 33	Re: Unusual Axle shaft? It was supposed to be from a 60-62 Eaton. I got it from Aspen in AZ. I'll call my local yard. They came up with the same type. I'll push for specific details.

12-20-2019, 07:54 AM	#9
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Unusual Axle shaft? Where did you find a new gear for the Eaton? I did not know that anyone was making gears for them. Post a picture of what is in the truck. You just never know with these trucks what may have been changed. The thickness of the spud after the C clip is very important that it is the correct thickness. That is what seats the C clip into the spider gear when the cross pin is installed. To thick and the pin will not go in, to thin and the C clip can come out. Your old axle looks like a 17 spline 12 bolt not an Eaton. That may be why the replacement does not look correct it may be for an Eaton. Jimmy Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

12-20-2019, 10:24 AM	#10
Todd46 Registered User Join Date: Oct 2019 Location: Clovis Posts: 33	Re: Unusual Axle shaft? Thanks Jimmy, I'll try and find a 12 bolt shaft and see what it looks like. Those were in the 64-66 trucks?

12-20-2019, 11:26 AM	#11
shortstep60 Registered User Join Date: Nov 2013 Location: Mayetta, Kansas Posts: 439	Re: Unusual Axle shaft? I think you need one out of a 63-64 I have one and it’s just like yours and it’s out of a 63

12-20-2019, 01:44 PM	#15
Todd46 Registered User Join Date: Oct 2019 Location: Clovis Posts: 33	Re: Unusual Axle shaft? I’ll try and get a picture. The shop found the gears for me. 3.38 are the only ones available. I’ll ask where they got them. There is also a guy that goes by mothertruckeraz who has gears for older trucks. Posted via Mobile Device

12-20-2019, 03:56 PM	#16
61K10 Registered User Join Date: Feb 2012 Location: pleasant valley--placerville ca Posts: 3,039	Re: Unusual Axle shaft? mine said yukon gear& axle on the box, who knows who made them. __________________ 1961 chevy K10 my build is------------61K10 build

12-26-2019, 01:23 AM	#18
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: Unusual Axle shaft? Its definitely not a 12bolt...like above ..maybe ho 32 or 33.. I'm not sure..I think Eaton but at the end of this post the guy says Eaton has bolts close together...http://67-72chevytrucks.com/vboard/s...d.php?t=426871 Then this...http://67-72chevytrucks.com/vboard/s...d.php?t=702889 __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver Last edited by mongocanfly; 12-26-2019 at 01:36 AM.

12-26-2019, 10:43 PM	#19
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Unusual Axle shaft? That is the Eaton HO32/33 which would be original to the truck. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

12-27-2019, 12:25 AM	#21
shortstep60 Registered User Join Date: Nov 2013 Location: Mayetta, Kansas Posts: 439	Re: Unusual Axle shaft? If you can’t find a axle I have a couple of those rear ends

01-07-2020, 04:36 AM	#23
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: Unusual Axle shaft? unless I'm missing something ,that's a open diff...not a posi __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

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