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Old 03-18-2009, 02:05 AM   #1 (permalink)
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eaton H072

well ive got an HO72 with 4.56's and a detroit and i found some threads on it but there are a few things i didnt get an answer to. first off do these axles have the strength to handle 40 inch + tires without bending. will the 17 spline shafts hold up to 40+ tires?? from what ive read about them theyre good but im still skeptacle about it. thanks for any help
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Old 03-18-2009, 02:58 AM   #2 (permalink)
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I had one with welded spiders and 456 gears,i put disc brakes on it, just like the 14 bolts use and ran 44s on two different trucks that i had, over a course of seven years.I had no problems at all with this axle.I beat the crap out of it.I would recomend it to anyone.
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Old 03-18-2009, 05:01 AM   #3 (permalink)
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IMO the Eaton H052/72 axle is the best kept secret in wheeling.

Ive run them up to 44 in tires, 500HP, filled'em with mud, and just generally hammered the piss out of them. With zero failure.
More strength, ground clearance, and less weight than a 14FF.
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Old 03-18-2009, 12:19 PM   #4 (permalink)
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If your worried about the shafts, you can put 14 bolt side gears and shafts in that housing. That's what I did. easy swap. Great axle. Wish I could find another one.
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Old 03-18-2009, 08:56 PM   #5 (permalink)
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IMO the Eaton H052/72 axle is the best kept secret in wheeling.

Ive run them up to 44 in tires, 500HP, filled'em with mud, and just generally hammered the piss out of them. With zero failure.
More strength, ground clearance, and less weight than a 14FF.
shhhhhhh !!!
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Old 03-18-2009, 09:31 PM   #6 (permalink)
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I had one with welded spiders and 456 gears,i put disc brakes on it, just like the 14 bolts use and ran 44s on two different trucks that i had, over a course of seven years.I had no problems at all with this axle.I beat the crap out of it.I would recomend it to anyone.
were you using the stock 17 splines?
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Old 03-18-2009, 10:23 PM   #7 (permalink)
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heres pics of it. and heres the pics of what i think is a napco front for ya odin.




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Old 03-18-2009, 10:37 PM   #8 (permalink)
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were you using the stock 17 splines?
Yes,all stock cept for the addition of disc brakes...The last truck i had that in was a full size 1 ton chevy open 60 front, eaton rear with welded spiders and 456s 13'' of lift and 400 horse small block,I would rev wide open and dump the clutch with 44s...broke alot of drive shafts and sheared the teeth off the 60s ring gear but never a problem at all with the eaton,and I always hear people bad mouth that axle....I just and say i'll take it off your hands...
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Old 03-18-2009, 10:45 PM   #9 (permalink)
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Yes,all stock cept for the addition of disc brakes...The last truck i had that in was a full size 1 ton chevy open 60 front, eaton rear with welded spiders and 456s 13'' of lift and 400 horse small block,I would rev wide open and dump the clutch with 44s...broke alot of drive shafts and sheared the teeth off the 60s ring gear but never a problem at all with the eaton,and I always hear people bad mouth that axle....I just and say i'll take it off your hands...
haha yea i think im gunna run the eaton rear with disks and 40's and ill just do a 60 up front.....does anyone have any idea what that front axle would be worth?
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Old 03-18-2009, 10:49 PM   #10 (permalink)
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Those axles would look sweet under a 57 long bed stepside I know of.
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Old 03-18-2009, 10:54 PM   #11 (permalink)
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haha yea i think im gunna run the eaton rear with disks and 40's and ill just do a 60 up front.....does anyone have any idea what that front axle would be worth?
That front axle is an interesting piece..I dont know what it is...... if it were me I would take it apart and see just what the hell I got before i sold it or bought something else..........
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Old 03-19-2009, 12:22 AM   #12 (permalink)
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it is a napco. ie: eaton with closed knuckles from what would become the d44.
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Old 03-19-2009, 12:50 AM   #13 (permalink)
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it is a napco. ie: eaton with closed knuckles from what would become the d44.
Ah,Then I would sell it....
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Old 03-19-2009, 01:48 AM   #14 (permalink)
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to who???

not very desirable, they only hold value to the resto crowd and good luck getting anything more $100.
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Old 03-19-2009, 02:49 AM   #15 (permalink)
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to who???

not very desirable, they only hold value to the resto crowd and good luck getting anything more $100.
To who ???????? How the hell should I know......I did say that I dont know what it is.....
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Old 03-19-2009, 08:36 AM   #16 (permalink)
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To me.....

pm sent
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Old 03-19-2009, 09:24 PM   #17 (permalink)
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what model year trucks do these Eaton HO52's come from. IIRC 60's era 1 Ton chevy's?
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Old 03-19-2009, 09:58 PM   #18 (permalink)
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what model year trucks do these Eaton HO52's come from. IIRC 60's era 1 Ton chevy's?
from at least 55-72.

most of the ones i have seen were in dualies.
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Old 03-19-2009, 10:30 PM   #19 (permalink)
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mine are on a 69
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Old 03-19-2009, 11:58 PM   #20 (permalink)
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The pics are of a 69 chassis? Reason I ask is Napco did some conversions to one ton trucks into the early 70's, but they were mostly Fords. Chevy had their own factory 1/2 ton and 3/4 ton trucks starting in 1960 I believe. Front axles on all of them were closed knuckle Dana 44's up to 66 for sure and maybe a year or 2 later. Like I said those axles would be perfect for a 57 longbed stepside I know of. The nostalgia crowd would be the market for these axles. Anybody who uses their 4x4 regularly would want more readily available axles.
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Old 03-20-2009, 12:19 AM   #21 (permalink)
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ive got one sitting in the yard . . 4.56 no locker . .ive heard alot of good about these axles and its too cool to sell. was thinkin of running it in the truck but not much for gear options . . or am i mistaken? can u run 14 bolt gear sets in these?
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Old 03-20-2009, 04:27 AM   #22 (permalink)
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not the gears as in ring and pinion, side gears and axle shafts. i dont know if the swap will work with the 052.
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Old 03-20-2009, 05:01 AM   #23 (permalink)
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from at least 55-72.

most of the ones i have seen were in dualies.
GM used them from 1947 to 1972.
Most Ive seen have been SRW.


14 boltFF side gears and locker can be used with H052/72 axles.
Only ring and pinion ratios are 4.10 4.57 5.13 and rumor has it 5.86.
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Old 03-20-2009, 05:04 AM   #24 (permalink)
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were you using the stock 17 splines?
I have always used the stock 17 spline axles.
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Old 03-20-2009, 08:48 AM   #25 (permalink)
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from the pic it looks like a smaller 52 comparible to a closed knuckle 44. are they 8 lug? I might be interested if it were.....maybe $100 tops though. my front & rear are 72 center, front is custom fabco......SA102 if I remember correctly. I would love another if I can find one.

BTW I know a guy that ran the ho72 in his tow trucks exclusively. licence plate reads NOS TOW, if that give an idea of how they hold up to big wheaght & abuse
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