What axle do I have? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ddsmith · 03-31-2005, 02:12 PM

This is a question that I post on the 60-66 board and got two different answers. I'm pretty sure it is applicable here because I think the axle carried over into 67-72 year trucks. I have a 66 C-30 dually. The pumpkin is round with a fill plug below the center point and off to one side. It has ten bolts on the cover. Two bolts on each side are close together where the axle housing head out toward the wheels. The question is what axle is it?

**JIMs70GMC** · 03-31-2005, 04:58 PM

H072:

jtminton · 03-31-2005, 05:25 PM

That looks exactly like mine. I've been wondering myself. Can anyone tell me what would the stock ratio be for that? I have a 72 C-30 Custom Camper.

**JIMs70GMC** · 03-31-2005, 05:27 PM

5.14

jtminton · 03-31-2005, 05:30 PM

5.14? Would that be why the tach reads 4k at 65????

jtminton · 03-31-2005, 06:29 PM

After further research, I probably have the HO52. Still, that 4.11 really hurts on the highway.

ddsmith · 03-31-2005, 06:33 PM

Yes, that is the one I have under my truck. Funny this doesn't show up on coloradok5 website under the axle identification page or maybe it does and I'm to stupid to know it. Is this axle also referred to as a corporate 10 bolt? What does the HO in the designator mean? The 72 I understand from the factory manual. 7200# rated axle/differential. Thanks for the help.

Don

ddsmith · 03-31-2005, 06:35 PM

Quote:

Originally Posted by jtminton

After further research, I probably have the HO52. Still, that 4.11 really hurts on the highway.

If you dig pain put the 5:14 rear in there and listen to it sing.

CE20934 · 03-31-2005, 06:52 PM

The Corporate 10 bolt is a semi-floater used mainly in cars & half-ton trucks. It also refers to the front axle of half-ton 4WDs.

As for the H072, it's a Regular Production Option code. The 072 you already know; the H designates "Rear Axle & Suspension Equipment" (same as G).

**JIMs70GMC** · 03-31-2005, 08:44 PM

The "eaton" axle is a corporate axle, spanned from 47-72, it was replaced by what is refered to as the 14 bolt full floater (14BFF). It would not be a 10 bolt as it has 12 bolts holding the carrier to the ring gear.

03-31-2005, 02:12 PM	#1
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	What axle do I have? This is a question that I post on the 60-66 board and got two different answers. I'm pretty sure it is applicable here because I think the axle carried over into 67-72 year trucks. I have a 66 C-30 dually. The pumpkin is round with a fill plug below the center point and off to one side. It has ten bolts on the cover. Two bolts on each side are close together where the axle housing head out toward the wheels. The question is what axle is it? __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

03-31-2005, 04:58 PM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	H072: __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

03-31-2005, 05:25 PM	#3
jtminton II Timothy 4:2 Join Date: Mar 2005 Location: Fort Worth Posts: 361	That looks exactly like mine. I've been wondering myself. Can anyone tell me what would the stock ratio be for that? I have a 72 C-30 Custom Camper. __________________ 72 C-20 2WD LWB Custom Camper Deluxe 350 4 Speed "Project Lazarus" MY TRUE PRIDE AND JOY "Dangit, Bobby, people will see that oil stain and think I'm a drunk."

03-31-2005, 05:27 PM	#4
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	5.14 __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

03-31-2005, 05:30 PM	#5
jtminton II Timothy 4:2 Join Date: Mar 2005 Location: Fort Worth Posts: 361	5.14? Would that be why the tach reads 4k at 65???? __________________ 72 C-20 2WD LWB Custom Camper Deluxe 350 4 Speed "Project Lazarus" MY TRUE PRIDE AND JOY "Dangit, Bobby, people will see that oil stain and think I'm a drunk."

03-31-2005, 06:29 PM	#6
jtminton II Timothy 4:2 Join Date: Mar 2005 Location: Fort Worth Posts: 361	After further research, I probably have the HO52. Still, that 4.11 really hurts on the highway. __________________ 72 C-20 2WD LWB Custom Camper Deluxe 350 4 Speed "Project Lazarus" MY TRUE PRIDE AND JOY "Dangit, Bobby, people will see that oil stain and think I'm a drunk."

03-31-2005, 06:33 PM	#7
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	Yes, that is the one I have under my truck. Funny this doesn't show up on coloradok5 website under the axle identification page or maybe it does and I'm to stupid to know it. Is this axle also referred to as a corporate 10 bolt? What does the HO in the designator mean? The 72 I understand from the factory manual. 7200# rated axle/differential. Thanks for the help. Don __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

03-31-2005, 06:52 PM	#9
CE20934 Senior Member Join Date: Apr 2002 Location: Help! I'm in an office park with its own network of freeways! Posts: 470	The Corporate 10 bolt is a semi-floater used mainly in cars & half-ton trucks. It also refers to the front axle of half-ton 4WDs. As for the H072, it's a Regular Production Option code. The 072 you already know; the H designates "Rear Axle & Suspension Equipment" (same as G). __________________ '67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. fingers crossed Last edited by CE20934; 03-31-2005 at 06:53 PM. Reason: clarity

03-31-2005, 08:44 PM	#10
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	The "eaton" axle is a corporate axle, spanned from 47-72, it was replaced by what is refered to as the 14 bolt full floater (14BFF). It would not be a 10 bolt as it has 12 bolts holding the carrier to the ring gear. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm



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