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03-03-2009, 05:26 PM
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#1 |
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Registered User
Join Date: Feb 2009
Location: Dallas
Posts: 60
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3/4Ton Dually????
Has anyone ever hear of a 3/4 ton 1963 dually??? The frame vin and cab vin match. Thanks to everyone who helped me find that.... The rear end and every thing appears to be original, but I have never seen a dually on a 3/4ton....
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03-03-2009, 06:54 PM
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#2 |
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Its Deja Vu time again
Join Date: Aug 2008
Location: Marysville, North of Seattle WA
Posts: 815
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Re: 3/4Ton Dually????
Is there any markings on the rear end?
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03-03-2009, 07:03 PM
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#3 |
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Registered User
Join Date: Feb 2009
Location: Dallas
Posts: 60
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Re: 3/4Ton Dually????
Still cleaning off years and years of grease.....I should have a number by this evening... The older gentleman I bought it from said his dad bought it new like that. They used it to move cars around with at there tow lot....
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03-03-2009, 08:23 PM
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#4 |
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Registered User
Join Date: Feb 2009
Location: Dallas
Posts: 60
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Dually Rear end
I finally found the the number on the rear end.... 393463 From the info I can get its a Eaton.... Does this sound right???
Last edited by Redline; 03-03-2009 at 09:22 PM. |
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03-04-2009, 01:37 AM
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#5 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: Dually Rear end
From what I could see in your pics, yes it is an Eaton HO52 or 72
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03-04-2009, 09:20 AM
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#6 |
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Registered User
Join Date: Feb 2009
Location: Dallas
Posts: 60
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Re: Dually Rear end
How do I figure out which one it is??? I looked online and couldn't find a manual.
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03-03-2009, 09:24 PM
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#7 |
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Registered User
Join Date: Feb 2009
Location: Dallas
Posts: 60
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Re: 3/4Ton Dually????
Got it..... I think its an Eaton, not sure though 393463
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03-03-2009, 11:56 PM
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#8 |
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Airport Bum
Join Date: Jan 2005
Location: Propwash (16Xray) D/FW, Texas
Posts: 320
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Re: 3/4Ton Dually????
Does it have offset wheels front and rear?
I have seen tons of 3/4 tons with 1 ton rearend retrofitted. Standard wheels front and offset rears. also JC Whitney used to sell adaptors to add standard offset duals. Those are scary IMHO
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1964 Chevrolet C-10 1941 Chevrolet coupe 1962 Thunderbird 1959 Edsel Villager 1963 Skylark |
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03-04-2009, 09:42 AM
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#9 |
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Registered User
Join Date: Feb 2009
Location: Dallas
Posts: 60
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Re: 3/4Ton Dually????
By offset do you mean does it use the same wheel? If so yes it is the same wheel just faced together
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03-04-2009, 10:26 AM
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#10 |
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Cantankerous Geezer
Join Date: Aug 2002
Location: Bel Aire, KS
Posts: 6,264
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Re: 3/4Ton Dually????
If there are 10 bolts in the cover flange, it is the HO 72 differential. The question about the wheels is are the same wheels used front and rear? The wheels for the 3/4 tone have a shallower setback. If the wheels are no the same, you have a truck that someone swapped the differential on.
While the dual wheels were not an option for the 3/4 ton, it is possible that either the dealer made the swap or the dealer had enough clout to have the factory put on the duals. Since there are no records that have survived, this is one mystery that will remain unsolved.
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Fred There is no such thing as too much cam...just not enough engine. 
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03-04-2009, 08:49 PM
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#11 |
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Registered User
Join Date: Feb 2007
Location: west coast
Posts: 3,396
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Re: 3/4Ton Dually????
Redline, Yes your truck is original. Chevy did offer a dual wheel option on C20 3/4 ton chassis cabs and stake models. Your vin should start C2503 for chassis cab or C2509 for stake bed.No mystery Fred. The 4.57 can be swapped out with a 4.10 from a pre 72 C 20, then I would go with a set of pre 1970 8-19.5 duals which can be found. This will be good for 65 mph with no welding or fabricating and still be period orginal.
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03-04-2009, 01:14 PM
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#12 |
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Registered User
Join Date: Feb 2009
Location: Dallas
Posts: 60
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Re: 3/4Ton Dually????
Yes they are the same exact wheel. Thanks for all the information!! At least now I know what I have so I can start building her back up. How are those HO 72 differentials???
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03-04-2009, 02:24 PM
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#13 |
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Airport Bum
Join Date: Jan 2005
Location: Propwash (16Xray) D/FW, Texas
Posts: 320
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Re: 3/4Ton Dually????
Would a 1 ton have trailing arm/coils?
CRS is kicking in. 
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1964 Chevrolet C-10 1941 Chevrolet coupe 1962 Thunderbird 1959 Edsel Villager 1963 Skylark |
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03-04-2009, 02:39 PM
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#14 |
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Cantankerous Geezer
Join Date: Aug 2002
Location: Bel Aire, KS
Posts: 6,264
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Re: 3/4Ton Dually????
The HO 52/72 is a good, reliable full-floater differential. They are not bulletproof by any means. Biggest problem is gearing. Not many selections. Available are 4.10, 4.56, and 5.14 (or so). So if you want better gears swapping to a 14 bolt is needed. The 10 bolt was dropped in 1972.
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Fred There is no such thing as too much cam...just not enough engine.
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03-04-2009, 04:13 PM
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#15 |
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TexasBowhunter
Join Date: Mar 2008
Location: alvin, texas
Posts: 450
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Re: 3/4Ton Dually????
Look in the back ground.
Is that a C20/30?
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Build in progress for son's first truck. |
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03-04-2009, 04:44 PM
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#16 |
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Registered User
Join Date: Feb 2009
Location: Dallas
Posts: 60
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Re: 3/4Ton Dually????
Not sure but I like it!!! Great photo
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