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#1 |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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What is the correct name for the axle in my truck for this year?
I found one, but the guy is asking me if I have the coarse or fine spline axles? Can anyone discuss this for me? ![]()
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#2 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,643
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Dunno the particulars, but from what I've gathered on this board, mine is an Eaton HO52.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#3 |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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Guy here locally wants 100.00 for it
I suppose complete would be best? Mine currently has a 14-bolt, which I prefer, but, the shock mounts arents welded good, and it has the later shock brackets still on it. I am unsure how much of what I have will work from my current axle to the 72 unit.... ![]()
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#4 |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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Who is a good supplier for the parts to rebuild these Eatons?
Is there any gears made for the Eatons? ![]()
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#5 |
huh ???
Join Date: Nov 2002
Location: Fredericksburg,Va.
Posts: 3,369
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My 72 3/4 ton has a stock Dana 60 rear in it...
Chuck
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90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!" |
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#6 |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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OK, are there several different 3/4 ton axles available in 72?
Pics?
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#7 |
Dork For Days
Join Date: Aug 2005
Location: Dallas
Posts: 407
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Dana 60
Mine's a Dana 60 as well.
Not sure how good this pic is, but... |
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#8 |
Registered User
Join Date: Dec 1999
Location: Old Mission, MI, USA
Posts: 2,510
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Dana 60 if it looks like the picture above. If the pumpkin is round with a drop out center section and a cover on the back with ten bolts holding it on, it is an HO52 GM corporate axle. A parts store will have no idea what you are talking about if you call it an "Eaton".
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Tim Last edited by Blazer1970; 10-08-2005 at 07:30 PM. |
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#9 |
Join Date: Dec 1999
Location: Eastern - Manitoba Canada, Winnipeg
Posts: 4,369
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17 spline on the corporate axle...thats course.
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#10 |
Cantankerous Geezer
Join Date: Aug 2002
Location: Bel Aire, KS
Posts: 6,264
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If it were mine and the only problem with the 14-bolt was the shock mounts, I would repair or replace them. Your truck probably had the 10 bolt HO72, since it is a one ton. That would mean 4.57 gears originally, would could be upgraded to 4.10 if you can find a used set, Randy's Ring & Pinion shows to be cutting 3.90s again, but they aren't cheap. Your 14 bolt probably has 3.73 gears, could also be 4.10 or 3.42 IIRC. Far better for driving and probably why the swap was made.
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Fred There is no such thing as too much cam...just not enough engine. ![]() |
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#11 | |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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![]() Quote:
I was referring to my 3/4 ton CC 72 but I am certain my 1-Ton has the Eaton, with the side locking bolt. Not sure on the 1-ton gear ratios. Weren't there 2 different Eaton axles??? Where is Randys Ring/Pinion and do they have a website???? ![]() I am looking at R/Ring the current 14-bolt, but I am not pleased by the weld that is present on the shock mounts! Besides, I am having quite a time trying to get this axle out to begin with! ![]() What is the Dana 60 application; I am a novice at these axles in our trucks! I sort of am a fan of the Dana axles; is the 14-Bolt a Dana issue? ![]()
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() Last edited by RPOZ11; 10-08-2005 at 08:48 PM. |
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#12 |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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QUESTION:
Why does one truck get 1 axle and others get different versions? Why did GM do this? I understand GVW! I understand a C30 from a C40, 50, 60, etc.... Just is weird to me why so many variations to the standard issue! ![]()
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() Last edited by RPOZ11; 10-08-2005 at 09:00 PM. |
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#13 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,643
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Quote:
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#14 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,643
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Quote:
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay Last edited by Stocker; 10-08-2005 at 08:58 PM. |
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#15 |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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Was this a regional decision thru GM?
Plants on different coasts supplying the factory, or was it weight related on GVW for orders and chassis's ????
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#16 | |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
|
Quote:
__________________
72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#17 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,643
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Quote:
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#18 | |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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![]() Quote:
I see you are running a 4X4... was there an Eaton, Dana for your trucks?
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#19 |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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From Randy's site....
GMHO72-390 12.25" GM 3.90 R&P(HO72_'62-'72)_ LONG_PINION&_LRG_PILOT General Motors 12.25 3.90 GMHO72-411 12.25" GM 4.10 R&P(HO72_'62-'72)_ LONG_PINION&_LRG_PILOT General Motors 12.25 4.10
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#20 | |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
|
![]() Quote:
"If the pumpkin is round with a drop out center section and a cover on the back with ten bolts holding it on, it is an HO52 GM corporate axle" Difference between the 52 and the 72?
__________________
72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#21 |
Senior Member
![]() Join Date: Sep 2005
Location: NE
Posts: 363
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The difference between a h052 and a h072 is only the brakes.I have had 3 or 4 of both and they appear identical.There was a h110 that was optional for the c30's and factory in the c40,c50,ect.
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01 2500 Duramax,6spd,4x4,Not stock. Estimated 550rwhp/1100rwfp on fuel only. 03 3500 Duramax,6spd,4x4,Pac-Brake,not stock Estimated 500rwhp/1000rwfp fuel only 67 K10 in many pieces Little Brothers truck 67 K20 Cummins 12V/NV4500/205, D60/Eaton w/ Detroit,37" Xterrains,crossover steering, Future plans,Twins and lots of fuel. |
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#22 |
72 BB C30 Super LongHorn
![]() Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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A commercial C/30 , and not a C/30 special order alike mine, correct???
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS ![]() |
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#23 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,643
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Quote:
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#24 |
Registered User
Join Date: Jun 2004
Location: Beeville, Texas
Posts: 1,943
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Didn't all big block C20-30 trucks come stock with the Dana 3.54 rear? Or maybe the Eaton/Corporate rear was special ordered?
The only difference between the HO52 and HO72 rears was the size of the brakes, and the HO72 rears had the pinion load adjusting bolt, but some HO52's had the pinion load bolt too. The one on my truck has it, not sure why. The size of the HO52's brakes are 2 1/2 x 11 5/32, and the HO72's are bigger, something like 2 1/2 x 12? The H110 axle was only used in special order HD C30's and the C40 trucks. The H110 rear had 10 lug 19.5" or 20" budd rims.
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RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck Last edited by Robert1970C20rstbukt; 10-08-2005 at 11:26 PM. |
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#25 |
Registered User
Join Date: Nov 2000
Location: Carver County, Minnesota, USA
Posts: 626
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From what I recall for 71/72 3/4 Tons is this:
Coil sprung rears got the Eaton HO52 Leaf sprung rears got the Dana 60 The 4x4's have the Eaton HO52 except for 1972 which is Dana 60 (from all the parts books that I can see) Don't know why 2 rears for the same truck, basically.
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72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71... Last edited by roger0080; 10-09-2005 at 01:31 PM. |
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