CA 4:10 Eaton - The 1947 - Present Chevrolet & GMC Truck Message Board Network

KrazyRay · 08-03-2012, 12:44 AM

I have a non posi eaton pulled from a 69 3/4 ton Chevy. It looks to be in good shape. 41 teeth on the ring gear and 10 teeth on the pinion gear.
$150 plus shipping. If the shipping is more than $100 to the east coast guys, I will pick up the difference. wpecina is first up.
Thanks,
Ray

tow guys · 08-03-2012, 06:16 AM

Interested pending fitment. I think I have an HO72. Not positive though. It's in a 1 ton dually. If it is, will this fit?
Thanks,
Tony

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Posted via Mobile Device

KrazyRay · 08-03-2012, 11:17 AM

I don't know for sure. There are some members that know the compatibilities.

tow guys · 08-03-2012, 04:58 PM

If it is confirmed that this will in fact work in my truck I am interested pending a shipping quote to zip 08721 in New Jersey. Let's figure out if it works first before you waste any time on that quote though.
You could also quote the shipping to my business address in Freehold NJ zip 07728. We have a loading dock there. Might be easier to unload it.

Thanks,
Tony

wpecina · 08-04-2012, 08:48 AM

Quote:

Originally Posted by KrazyRay

I have a non posi eaton pulled from a 69 3/4 ton Chevy. It looks to be in good shape. 41 teeth on the ring gear and 10 teeth on the pinion gear.
$150 plus shipping. If the shipping is more than $100 to the east coast guys, I will pick up the difference. wpecina is first up.
Thanks,
Ray

Thanks Ray - I am checking mine today to be sure it is a 4:57 - if yes - I want your 4:11.

Wayne

pumpkin · 08-04-2012, 11:24 AM

They do interchange. From the best that I can find an HO72 has the load bolt for the ring gear, and the HO52 does not. That seems to be the only differance I can find between the two diffs.

KrazyRay · 08-04-2012, 12:43 PM

Wayne...Let me know when you find out. I can ship Monday.

Tony...They are compatible with the HO72. Member Jessechop has done the swap. pummkin...thanks!

Thanks,
Ray

wpecina · 08-04-2012, 02:54 PM

Ray,

I had about 22.2 turns of the driveshaft for 10 turns of one rear wheel. Per another member that yields about a 4:44 ratio - can I assume it is a 4:57 from this?

Thanks,

Wayne

KrazyRay · 08-04-2012, 03:00 PM

Wayne, Its most likely a 4:57. You can pull the cover and look for the stamping to be sure.

tow guys · 08-04-2012, 04:27 PM

Quote:

Originally Posted by pumpkin

They do interchange. From the best that I can find an HO72 has the load bolt for the ring gear, and the HO52 does not. That seems to be the only differance I can find between the two diffs.

What about axle spline count? Were there different axles for the 3/4 ton and 1 ton rears?
Also, coming from an axle ratio in the high 500's, and a top speed of about 55mph, what can I expect out of a 4:10 swap?

KrazyRay · 08-04-2012, 11:43 PM

There are 17 splines on the axles. I would think you could gain 20% top speed if yours is in the 5's.

wpecina · 08-05-2012, 10:11 PM

Quote:

Originally Posted by KrazyRay

Wayne, Its most likely a 4:57. You can pull the cover and look for the stamping to be sure.

Ray,

I hope to pull the cover Mon. evening.

Thanks,

Wayne

wpecina · 08-06-2012, 10:10 PM

RAY - i PULLED THE COVER - HERE ARE ALL THE NUMBERS:

3682104

GM 7-32

6 54

The 6 54 is stamped as your 10 41 in the picture you sent.

wpecina · 08-06-2012, 10:11 PM

Quote:

Originally Posted by KrazyRay

Wayne, Its most likely a 4:57. You can pull the cover and look for the stamping to be sure.

RAY - i PULLED THE COVER - HERE ARE ALL THE NUMBERS:

3682104

GM 7-32

6 54

The 6 54 is stamped as your 10 41 in the picture you sent.

Thanks

Wayne

wpecina · 08-06-2012, 10:13 PM

Quote:

Originally Posted by wpecina

Ray,

I hope to pull the cover Mon. evening.

Thanks,

Wayne

Sorry- the 7-32 looks like the 10-41 in your picdture.

My bad

so what is a 7-32??

wpecina · 08-06-2012, 10:34 PM

Quote:

Originally Posted by KrazyRay

I have a non posi eaton pulled from a 69 3/4 ton Chevy. It looks to be in good shape. 41 teeth on the ring gear and 10 teeth on the pinion gear.
$150 plus shipping. If the shipping is more than $100 to the east coast guys, I will pick up the difference. wpecina is first up.
Thanks,
Ray

Ray - 32/7 =4.57 DAH!!

I want yours - how do you want to get paid?

Wayne

KrazyRay · 08-07-2012, 12:47 AM

pm sent

racenhogs · 09-08-2018, 10:07 PM

If anyone knows where I can find a center section for my 3600 it would be awesome...please help!

**Stocker** · 09-09-2018, 12:48 AM

Quote:

Originally Posted by pumpkin

They do interchange. From the best that I can find an HO72 has the load bolt for the ring gear, and the HO52 does not. That seems to be the only differance I can find between the two diffs.

Can't tell you any specific differences between HO72 and HO52 (axles? brakes? splines?).
This much I know.... All HO72s have the load bolt.... Some HO52s do have the load bolt and some do not.

Before anyone mentions it.... yeah, I realize this is an old thread. Just taking the opportunity to share a snippet of information.

Stagerunner · 09-12-2018, 11:36 PM

Stocker is correct. Early ho52 did not have load bolt late ones did. Pumpkins do interchange. Real difference is ho72 used bigger brakes since mostly used in 1 ton trucks

**1968k20** · 09-13-2018, 06:38 AM

I've got an ho 52/72 sitting in my garage. I'll look at it late afternoon for you.

racenhogs · 09-13-2018, 10:01 AM

Buddy...that would be great if you check and see if you have a 4.10 gear set in an HO52/72 carrier...please let me know.

R/Charlie

Killer Bee · 09-13-2018, 11:52 AM

hey Lisa, if you have gears for Charlie, I'll take the locker off your hands if it has one

Killer Bee · 09-13-2018, 11:54 AM

and btw, the 4.10 should be stamped on the ring gear expressed in tooth count..

**1968k20** · 09-13-2018, 02:19 PM

I'll look into it tonight, KB! Thank you

08-03-2012, 12:44 AM	#1
KrazyRay Registered User Join Date: Jun 2009 Location: Oroville, CA Posts: 4,827	4:10 Eaton I have a non posi eaton pulled from a 69 3/4 ton Chevy. It looks to be in good shape. 41 teeth on the ring gear and 10 teeth on the pinion gear. $150 plus shipping. If the shipping is more than $100 to the east coast guys, I will pick up the difference. wpecina is first up. Thanks, Ray Attached Images

08-03-2012, 06:16 AM	#2
tow guys Registered User Join Date: Dec 2010 Location: Bayville NJ Posts: 385	Re: 4:10 Eaton Interested pending fitment. I think I have an HO72. Not positive though. It's in a 1 ton dually. If it is, will this fit? Thanks, Tony Posted via Mobile Device Posted via Mobile Device __________________ Check out my 70 GMC tow truck project here.......http://67-72chevytrucks.com/vboard/s...d.php?t=440431 Member of the 1-Ton Club! http://www.eastcoastcarandtruck.org

08-03-2012, 11:17 AM	#3
KrazyRay Registered User Join Date: Jun 2009 Location: Oroville, CA Posts: 4,827	Re: 4:10 Eaton I don't know for sure. There are some members that know the compatibilities.

08-03-2012, 04:58 PM	#4
tow guys Registered User Join Date: Dec 2010 Location: Bayville NJ Posts: 385	Re: 4:10 Eaton If it is confirmed that this will in fact work in my truck I am interested pending a shipping quote to zip 08721 in New Jersey. Let's figure out if it works first before you waste any time on that quote though. You could also quote the shipping to my business address in Freehold NJ zip 07728. We have a loading dock there. Might be easier to unload it. Thanks, Tony __________________ Check out my 70 GMC tow truck project here.......http://67-72chevytrucks.com/vboard/s...d.php?t=440431 Member of the 1-Ton Club! http://www.eastcoastcarandtruck.org

08-04-2012, 11:24 AM	#6
pumpkin Registered User Join Date: Apr 2006 Location: East Sooke B.C. Canada Posts: 543	Re: 4:10 Eaton They do interchange. From the best that I can find an HO72 has the load bolt for the ring gear, and the HO52 does not. That seems to be the only differance I can find between the two diffs.

08-04-2012, 12:43 PM	#7
KrazyRay Registered User Join Date: Jun 2009 Location: Oroville, CA Posts: 4,827	Re: 4:10 Eaton Wayne...Let me know when you find out. I can ship Monday. Tony...They are compatible with the HO72. Member Jessechop has done the swap. pummkin...thanks! Thanks, Ray

08-04-2012, 02:54 PM	#8
wpecina Registered User Join Date: Jul 2012 Location: niles, mi Posts: 12	Re: 4:10 Eaton Ray, I had about 22.2 turns of the driveshaft for 10 turns of one rear wheel. Per another member that yields about a 4:44 ratio - can I assume it is a 4:57 from this? Thanks, Wayne

08-04-2012, 03:00 PM	#9
KrazyRay Registered User Join Date: Jun 2009 Location: Oroville, CA Posts: 4,827	Re: 4:10 Eaton Wayne, Its most likely a 4:57. You can pull the cover and look for the stamping to be sure.

08-04-2012, 11:43 PM	#11
KrazyRay Registered User Join Date: Jun 2009 Location: Oroville, CA Posts: 4,827	Re: 4:10 Eaton There are 17 splines on the axles. I would think you could gain 20% top speed if yours is in the 5's.

08-06-2012, 10:10 PM	#13
wpecina Registered User Join Date: Jul 2012 Location: niles, mi Posts: 12	Re: 4:10 Eaton RAY - i PULLED THE COVER - HERE ARE ALL THE NUMBERS: 3682104 GM 7-32 6 54 The 6 54 is stamped as your 10 41 in the picture you sent.

08-07-2012, 12:47 AM	#17
KrazyRay Registered User Join Date: Jun 2009 Location: Oroville, CA Posts: 4,827	Re: 4:10 Eaton pm sent

09-08-2018, 10:07 PM	#18
racenhogs Registered User Join Date: Sep 2018 Location: Yuma, AZ Posts: 9	Re: 4:10 Eaton If anyone knows where I can find a center section for my 3600 it would be awesome...please help!

09-12-2018, 11:36 PM	#20
Stagerunner Registered User Join Date: Feb 2015 Location: St. Louis, mo Posts: 66	Re: 4:10 Eaton Stocker is correct. Early ho52 did not have load bolt late ones did. Pumpkins do interchange. Real difference is ho72 used bigger brakes since mostly used in 1 ton trucks

09-13-2018, 06:38 AM	#21
1968k20 Senior Member Join Date: Dec 2009 Location: Chester,California Posts: 5,632	Re: 4:10 Eaton I've got an ho 52/72 sitting in my garage. I'll look at it late afternoon for you. __________________ 1977 Chevrolet K10 SWB Project 350/4spd/np205 1977 Chevrolet K20 LWB 350/350/203 1991 4Runner 22RE 5 SPD Yanmar Tractor 3 Cyl Diesel

09-13-2018, 10:01 AM	#22
racenhogs Registered User Join Date: Sep 2018 Location: Yuma, AZ Posts: 9	Re: 4:10 Eaton Buddy...that would be great if you check and see if you have a 4.10 gear set in an HO52/72 carrier...please let me know. R/Charlie



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09-13-2018, 11:52 AM	#23
Killer Bee Registered User Join Date: Jan 2016 Location: Barber City, CA Posts: 4,825	Re: 4:10 Eaton hey Lisa, if you have gears for Charlie, I'll take the locker off your hands if it has one __________________ *I started out with nothing - and I still have most of it*

09-13-2018, 11:54 AM	#24
Killer Bee Registered User Join Date: Jan 2016 Location: Barber City, CA Posts: 4,825	Re: 4:10 Eaton and btw, the 4.10 should be stamped on the ring gear expressed in tooth count.. __________________ *I started out with nothing - and I still have most of it*

09-13-2018, 02:19 PM	#25
1968k20 Senior Member Join Date: Dec 2009 Location: Chester,California Posts: 5,632	Re: 4:10 Eaton I'll look into it tonight, KB! Thank you __________________ 1977 Chevrolet K10 SWB Project 350/4spd/np205 1977 Chevrolet K20 LWB 350/350/203 1991 4Runner 22RE 5 SPD Yanmar Tractor 3 Cyl Diesel

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