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| | | | Joined: Nov 2000 Posts: 1,969 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,969 | So I am looking at a 68 C20 that's for sale in my town. I kneel down to look under the rear of it expecting to see the round cover of an Eaton HO-whatever, but no. I don't see that. I see a rear cover that's more or less octagon shaped with the right side stretched-out. There's a visible ridge left of center that I guess is clearance for the ring gear. I didn't count the bolts. Of course it's full floating with 8 wheel studs.
So... what is it?
I am not as up on this series truck as A.D. models. What rears were available?
And I know a lot can and does happen in 40+ years, so I guess it could have been swapped.
Thanks!
Professional Novice
| | | | | Joined: Feb 2004 Posts: 29,818 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,818 | Check this link: http://ts2.mm.bing.net/images/thumbnail.aspx?q=1520153275641&id=f3b49e9efe0b2d6d76ca361171e95ef9If it looks like that, it's a Dana type 60. Very good axle, with plenty of ratios available. It was used by several manufacturers, including GMC, Ford ,Chrysler, International, etc. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | It could also be a Dana 70, which is virtually identical in shape, only larger (10.5" ring gear vs 9.75" ). Those were also common in GMCs of the era, and was optional in Chevrolet, especially 1 ton and Camper Specials.
Bill Burmeister
| | | | | Joined: Feb 2004 Posts: 29,818 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,818 | The Dana 70 was intended to be used with dual-wheel hubs- - - -longer, larger-diameter wheel studs, bigger brake drums, and usually somewhat heavier-capacity hubs with bigger bearings.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | I won't disagree with you on that, most likely it is the 60. But I have seen a few single wheel trucks with the 70, all of them were leaf spring trucks with either the 1 ton package/Longhorn C20, or they were Camper Specials/Camper Customs. One of them was a '69 Camper Special that belonged to my Grandfather (my uncle still has it), and there was also a '71 GMC Camper Custom I almost bought. Both definetly had 70s in them.
Bill Burmeister
| | | | | Joined: Nov 2000 Posts: 1,969 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,969 | Thanks guys! I will take another look at it as I don't remember right now if it had leaves or coils... and it had no markings such as Camper Special, etc. There was a metal nameplate "Custom Cab" on each door under the window. It's an automatic (THM) but I don't know what's under the hood...
It's really a newer truck than I am usually interested in, but something about it has caught my eye.
Professional Novice
| | | | | Joined: Oct 2010 Posts: 91 Shop Shark | | Shop Shark Joined: Oct 2010 Posts: 91 | count the bolts,it may be a corperate 14 bolt.put one in my 46 one ton with 373:1 gears.It came out of a 70,s or 80,s 3/4 ton chevy | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | The Corporate 14 bolt would not be original to a '68, they didn't come out until '73.
Some additional ways to ID what type of Dana it could be; On Dana and Spicer differentials, the series is cast on the housing, usually on top ofthe pinion snout, though I have seen some with the number cast on the left side of the case on the rear, next to the axle tube. Some wll also have the number stamped on the center of the cover, usually under the Dana/Spicer name and logo.
Bill Burmeister
| | | | | Joined: Jun 2009 Posts: 79 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2009 Posts: 79 | A quick way of telling a 14 bolt from a dana 60 is the 14 bolt rear covers dont have a fill plug in them, theirs is on the side in the front right side of the casting while the dana axles had a plug in the steel cover. | | | | | Joined: Nov 2000 Posts: 1,969 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,969 | Just a follow-up: I looked again and it has leaf springs with a 10-bolt cover like in the pic Lincoln posted, so I guess it's a Dana 60. The "for sale" sign reads V8. If I remember right a 68 may have a 307, 350 or 396, right?
I don't think I will pursue this any further - the truck has more rust than I want to deal with...
Thanks for the info!
Professional Novice
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