3/4ton with 1 ton axels - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dan72cst · 01-25-2003, 11:47 PM

Over the years I have seen many trucks advertised this way. What exactly does this mean?

mikep · 01-26-2003, 12:16 AM

It doesnt really apply to our trucks but post 73 trucks and especially post 82's often had 3/4 ton running gear with 6 lug lighter duty axles. The GVW actually reflecting what a 3/4 ton payload would be unlike our where a 3/4 ton rating truck would haul more like 3000 lbs. . A heavy 3/4 ton would be a 3/4 ton with 1 ton running gear ie 8 lug axle and suspension.

da-burb · 01-26-2003, 12:22 AM

I have also heard a lot of people describe the corp/eaton rearend as the "1 ton axle".
Just like the people who might call their 67-70 C-10's a "heavy half" because it came with 6 lugs.

Longhorn Man · 01-26-2003, 12:48 AM

What Da-burb said is what I usually see.

u2slow · 01-26-2003, 02:50 AM

6-lug 3/4-tons didn't show up until '88.

"One ton axles" on a 4x4 usually means a 14-bolt full-floater (or the big Eaton) and a Dana 60 front.

*rustedchevy* · 01-26-2003, 09:32 PM

and dana 60 front was only available under the K30's. all other series under that got the dana 44 or the 10 bolt 8.5" Corp axle so...

roger0080 · 01-26-2003, 11:47 PM

I've always understood the "heavy half" as a 1/2T PU with a 3/4T Rear axle setup. My memory says that with a heavy half, the front would sit lower than the rear (at least after 20 years anyways!).

-Roger

Fred T · 01-27-2003, 12:18 AM

Roger's right, but with a six lug setup on the 3/4 ton axle. If you go to the older trucks, the 3/4 and 1 ton used the same rear axle. When I was looking at 14 bolt floaters for my 52, I was told the housings were the same design, differences were in housing and axle length, drums and brakes being bigger for the 1 ton.

u2slow · 01-27-2003, 01:32 AM

Quote:

Originally posted by rustedchevy
and dana 60 front was only available under the K30's.

Very true! And 77-91 inclusive I might add.

Often when ads say "1-ton axles" on a 1/2 or 3/4-ton, they mean the 1-ton axles have been swapped in.

If it was "1-ton rear axle" it probably means it has a full-floating rear (original or swapped). Most 3/4-tons after '80 had semi-floating rears.

Bowed · 01-27-2003, 10:55 PM

My 1967 C20 has an 8 lug / 14 bolt rear , with each out side hub having 8 cap bolts and a removeable cover to allow the axles to pull out . I understood this was a one ton full floater and It appears to be original to the truck . Did any one ton FF come on 67 C20'S ?

mikep · 01-27-2003, 10:59 PM

GM didnt even start making 14 bolt rear ends until 73. Yours was swapped in later.

Bowed · 01-27-2003, 11:15 PM

Quote:

Originally posted by mikep
GM didnt even start making 14 bolt rear ends until 73. Yours was swapped in later.

Who ever did mine did an excellent job with the pan hard bar mount appearing to be unchanged and factory welded with even the brake line passing thru the small hole in the mount and no sign of other changes like the later shock mounts being removed or things like that .

mikep · 01-27-2003, 11:18 PM

This might be a dumb question but are you sure its not a Dana 60 because those did come on coil sprung C20's .

Bowed · 01-27-2003, 11:18 PM

What is a 14 bolt FF worth ?

Bowed · 01-27-2003, 11:24 PM

Quote:

Originally posted by mikep
This might be a dumb question but are you sure its not a Dana 60 because those did come on coil sprung C20's .

It's not a dumb question , Actualy I do not know how to identify a dana 60 . It is 14 bolt with the end hubs that unbolt for axle removal .

mikep · 01-27-2003, 11:27 PM

Oh . How many bolts does the cover have ?

Bowed · 01-27-2003, 11:34 PM

Ok my stupid , I just went and counted them again and the cover has 10 bolts and each end hub has 8 cap bolts to hold on the hub covers .

mikep · 01-27-2003, 11:34 PM

does it look like this?

mikep · 01-27-2003, 11:35 PM

You have a Dana 60. Welcome to the club.

Bowed · 01-27-2003, 11:40 PM

Quote:

Originally posted by mikep
does it look like this?

The picture did not show clearly on my computer , but I trust your judgement that it is a 60 . Sorry I made it so tough by not remembering the right bolt count on the cover . Thanks .

mikep · 01-27-2003, 11:47 PM

Do you have coils in back. I assume you do as you said you had a panhard bar. Yours is pretty rare then. Mine has coils too but I have only seen a few that do although there are some on this board who swear that none of them did. Theyr'e quite wrong . Do you know what the gearing in yours is?

HotRod929 · 01-28-2003, 12:00 AM

Heres a better pic of a Dana 60

HotRod929 · 01-28-2003, 12:01 AM

One more...

HotRod

Bowed · 01-28-2003, 01:23 AM

Thanks for the pic's hotrod but that is not it ,

, mine is rounder on the back side ( without the chunky reinforced areas ) but on the drive shaft side it has large horizontal and vertical ribs for reinforcement . On mine the axle tubes become very large at the pumpkin , instead of the chunky metal areas where the tubes meet the pumpkin in your pictures .

MikeP , yes it is a coil rear .

mikep · 01-28-2003, 01:27 AM

Do you have a series or studs with nuts around the perimeter on the side of the rear end that faces towards the transmission. It sounds like you have an Eaton if so .

HA HA HA ... I have the only coil sprung Dana 60 here then.... Muhaha !

01-25-2003, 11:47 PM	#1
Dan72cst Registered User Join Date: Feb 2001 Location: Lake Stevens,WA 98258 North of Seattle Posts: 833	3/4ton with 1 ton axels Over the years I have seen many trucks advertised this way. What exactly does this mean? __________________ Marysville, WA (Dan72cst@hotmail.com) 72 4wd Blazer CST 350/350 72 4wd Chevy LWB 350/350 68 2wd Chevy LWB 327/400

01-26-2003, 12:16 AM	#2
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	It doesnt really apply to our trucks but post 73 trucks and especially post 82's often had 3/4 ton running gear with 6 lug lighter duty axles. The GVW actually reflecting what a 3/4 ton payload would be unlike our where a 3/4 ton rating truck would haul more like 3000 lbs. . A heavy 3/4 ton would be a 3/4 ton with 1 ton running gear ie 8 lug axle and suspension. __________________ No truck :-(

01-26-2003, 12:22 AM	#3
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	I have also heard a lot of people describe the corp/eaton rearend as the "1 ton axle". Just like the people who might call their 67-70 C-10's a "heavy half" because it came with 6 lugs. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

01-26-2003, 02:50 AM	#5
u2slow Web Wheeler Join Date: Jan 2000 Location: BC, Canada, eh? Posts: 388	6-lug 3/4-tons didn't show up until '88. "One ton axles" on a 4x4 usually means a 14-bolt full-floater (or the big Eaton) and a Dana 60 front. __________________ '66 C10 longstep - Clifford equiped '84 C20 Suburban 6.2L - awaiting 4x4 conversion '91 V3500 Crewcab - awaiting diesel swap

01-26-2003, 11:47 PM	#7
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	I've always understood the "heavy half" as a 1/2T PU with a 3/4T Rear axle setup. My memory says that with a heavy half, the front would sit lower than the rear (at least after 20 years anyways!). -Roger __________________ 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...

01-26-2003, 12:48 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	What Da-burb said is what I usually see.

01-26-2003, 09:32 PM	#6
rustedchevy Account Suspended Join Date: Jan 2003 Location: il Posts: 115	and dana 60 front was only available under the K30's. all other series under that got the dana 44 or the 10 bolt 8.5" Corp axle so...

01-27-2003, 12:18 AM	#8
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Roger's right, but with a six lug setup on the 3/4 ton axle. If you go to the older trucks, the 3/4 and 1 ton used the same rear axle. When I was looking at 14 bolt floaters for my 52, I was told the housings were the same design, differences were in housing and axle length, drums and brakes being bigger for the 1 ton. __________________ Fred There is no such thing as too much cam...just not enough engine.

01-27-2003, 10:55 PM	#10
Bowed Registered User Join Date: Oct 2002 Location: where it's hot Posts: 1,059	????????????????/ My 1967 C20 has an 8 lug / 14 bolt rear , with each out side hub having 8 cap bolts and a removeable cover to allow the axles to pull out . I understood this was a one ton full floater and It appears to be original to the truck . Did any one ton FF come on 67 C20'S ?

01-27-2003, 10:59 PM	#11
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	GM didnt even start making 14 bolt rear ends until 73. Yours was swapped in later. __________________ No truck :-(

01-27-2003, 11:18 PM	#13
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	This might be a dumb question but are you sure its not a Dana 60 because those did come on coil sprung C20's . __________________ No truck :-(

01-27-2003, 11:27 PM	#16
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Oh . How many bolts does the cover have ? __________________ No truck :-(

01-27-2003, 11:34 PM	#17
Bowed Registered User Join Date: Oct 2002 Location: where it's hot Posts: 1,059	Ok my stupid , I just went and counted them again and the cover has 10 bolts and each end hub has 8 cap bolts to hold on the hub covers .

01-27-2003, 11:34 PM	#18
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	does it look like this? Attached Images __________________ No truck :-(

01-27-2003, 11:35 PM	#19
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	You have a Dana 60. Welcome to the club. __________________ No truck :-(



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01-27-2003, 11:47 PM	#21
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Do you have coils in back. I assume you do as you said you had a panhard bar. Yours is pretty rare then. Mine has coils too but I have only seen a few that do although there are some on this board who swear that none of them did. Theyr'e quite wrong . Do you know what the gearing in yours is? __________________ No truck :-(

01-28-2003, 12:00 AM	#22
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	Heres a better pic of a Dana 60 Attached Images __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

01-28-2003, 12:01 AM	#23
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	One more... HotRod Attached Images __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

01-28-2003, 01:23 AM	#24
Bowed Registered User Join Date: Oct 2002 Location: where it's hot Posts: 1,059	Thanks for the pic's hotrod but that is not it , , mine is rounder on the back side ( without the chunky reinforced areas ) but on the drive shaft side it has large horizontal and vertical ribs for reinforcement . On mine the axle tubes become very large at the pumpkin , instead of the chunky metal areas where the tubes meet the pumpkin in your pictures . MikeP , yes it is a coil rear . Last edited by Bowed; 01-28-2003 at 01:36 AM.

01-28-2003, 01:27 AM	#25
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Do you have a series or studs with nuts around the perimeter on the side of the rear end that faces towards the transmission. It sounds like you have an Eaton if so . HA HA HA ... I have the only coil sprung Dana 60 here then.... Muhaha ! __________________ No truck :-(

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