rear diff - The 1947 - Present Chevrolet & GMC Truck Message Board Network

48 ish · 03-26-2007, 07:37 PM

I bought a 67 C20 Camper Special a while back, and someone told me recently that they all came stock with one ton rear diffs. Can anyone tell me if thats true?

71chevylowrider · 03-26-2007, 07:38 PM

I feel an answer coming forth from Longhornman

Longhorn Man · 03-26-2007, 09:20 PM

yes and no.
A camper special is nothng more than HD shocks, HD springs, HD tires, a sway bar, and badges... that is all that came in the option package.

Now, the eaton/corp rear axle (identified byt a round salad bowl looking rear cover, and a drop out center section like a 9 inch ford) that came in a 3/4 ton, and that came in a one ton, are basicly one and the same... the brakes are all that was really beefed up. However, as a rear axle assembly, from drum to drum, the HO 52 (3/4 ton) and HO 72 (one ton) rears, are not the same.
One other tidbit of info, if you have a coil spring rear, then it can not be used in a one ton, becouse one tons always had coils.

Snew · 03-26-2007, 09:22 PM

Quote:

Originally Posted by Longhorn Man

One other tidbit of info, if you have a coil spring rear, then it can not be used in a one ton, becouse one tons always had coils.

Did you mean one tons always had leaf springs?

**kwmech** · 03-26-2007, 09:23 PM

Quote:

Originally Posted by Longhorn Man

One other tidbit of info, if you have a coil spring rear, then it can not be used in a one ton, becouse one tons always had LEAF SPRINGS

fixed it for ya.

DOH--too slow

Longhorn Man · 03-26-2007, 10:20 PM

LOL... yeah, I ment one tons always have leafs.
Thanks for pointing that out.

71chevylowrider · 03-26-2007, 10:25 PM

I guess I was right eh?

dan42 · 03-27-2007, 12:10 AM

Longhorn man, the cheese stands alone! you da man!

**WorkinLonghorn** · 03-27-2007, 12:33 AM

Hey,welcome to the board 48 ish. Let's see some pics!

48 ish · 03-27-2007, 04:40 PM

Thanks for the help guys. I'll post some pics as soon as I figure this site out. The 67 C20 has been sitting a long time and I havne't had a chance to do anything with it. Bought it to tow my 5th wheel after I beef it up. My baby is my 48- 350/700R4, Nova clip, Chevell rear suspension, air bags, custom dash, coast to coast 3 times, San Diego to Canada twice.....

Bob Moore · 03-27-2007, 07:53 PM

Did Andy cut the cheese?

Tx Firefighter · 03-27-2007, 07:57 PM

Andy, you need to talk about the differences between an HO52 and an HO72. Mainly,the load bolt on the pinion.

martinkh · 03-27-2007, 08:24 PM

Count the bolts in the rear pumpkin. 14= 1-ton

Tx Firefighter · 03-27-2007, 08:28 PM

The center section of the 3/4 ton and 1 ton rears will swap directly back and forth. They have the same number of bolts.

Longhorn Man · 03-27-2007, 11:24 PM

Tx, every HO52 I have had had the preload bolt.

48 ish · 03-28-2007, 01:57 PM

Thanks again guys for the help, here's a shot of both the 67 and the 48....A bigger one is on my profile. Plans for the 67 include a Caddie 500/400 turbo, aux tranny, one ton dually rear, disc brakes all the way around and air bags to augment the coils in the rear...

03-26-2007, 07:37 PM	#1
48 ish Registered User Join Date: Mar 2007 Location: Kennewick, WA Posts: 65	rear diff I bought a 67 C20 Camper Special a while back, and someone told me recently that they all came stock with one ton rear diffs. Can anyone tell me if thats true?

03-26-2007, 07:38 PM	#2
71chevylowrider Senior Member Join Date: Sep 2006 Location: Vancouver, WA Posts: 1,015	Re: rear diff I feel an answer coming forth from Longhornman

03-26-2007, 09:20 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: rear diff yes and no. A camper special is nothng more than HD shocks, HD springs, HD tires, a sway bar, and badges... that is all that came in the option package. Now, the eaton/corp rear axle (identified byt a round salad bowl looking rear cover, and a drop out center section like a 9 inch ford) that came in a 3/4 ton, and that came in a one ton, are basicly one and the same... the brakes are all that was really beefed up. However, as a rear axle assembly, from drum to drum, the HO 52 (3/4 ton) and HO 72 (one ton) rears, are not the same. One other tidbit of info, if you have a coil spring rear, then it can not be used in a one ton, becouse one tons always had coils.

03-26-2007, 10:20 PM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: rear diff LOL... yeah, I ment one tons always have leafs. Thanks for pointing that out.

03-26-2007, 10:25 PM	#7
71chevylowrider Senior Member Join Date: Sep 2006 Location: Vancouver, WA Posts: 1,015	Re: rear diff I guess I was right eh?

03-27-2007, 12:10 AM	#8
dan42 Registered User Join Date: Feb 2007 Location: Cali Central Coast Posts: 5,191	Re: rear diff Longhorn man, the cheese stands alone! you da man! __________________ '67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD Click here to support the board Philippians 4: 6-7

03-27-2007, 12:33 AM	#9
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,883	Re: rear diff Hey,welcome to the board 48 ish. Let's see some pics! __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

03-27-2007, 04:40 PM	#10
48 ish Registered User Join Date: Mar 2007 Location: Kennewick, WA Posts: 65	Re: rear diff Thanks for the help guys. I'll post some pics as soon as I figure this site out. The 67 C20 has been sitting a long time and I havne't had a chance to do anything with it. Bought it to tow my 5th wheel after I beef it up. My baby is my 48- 350/700R4, Nova clip, Chevell rear suspension, air bags, custom dash, coast to coast 3 times, San Diego to Canada twice..... Last edited by 48 ish; 03-27-2007 at 04:45 PM.

03-27-2007, 07:53 PM	#11
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	Re: rear diff Did Andy cut the cheese? __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

03-27-2007, 07:57 PM	#12
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: rear diff Andy, you need to talk about the differences between an HO52 and an HO72. Mainly,the load bolt on the pinion. __________________ I'm on the Instagram- @Gearhead_Kevin

03-27-2007, 08:24 PM	#13
martinkh Registered User Join Date: Mar 2007 Location: Boise Posts: 107	Re: rear diff Count the bolts in the rear pumpkin. 14= 1-ton __________________ '70gmc 3/4ton 4X4, re-arch and 2" add-a-leaf lift. '77 400sbc, '82 axles, d60front, 14bolt rear. Probably some 285/75/16 Toyo m/t's on my stock rims coming up.

03-27-2007, 08:28 PM	#14
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: rear diff The center section of the 3/4 ton and 1 ton rears will swap directly back and forth. They have the same number of bolts. __________________ I'm on the Instagram- @Gearhead_Kevin

03-27-2007, 11:24 PM	#15
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: rear diff Tx, every HO52 I have had had the preload bolt.

03-28-2007, 01:57 PM	#16
48 ish Registered User Join Date: Mar 2007 Location: Kennewick, WA Posts: 65	Re: rear diff Thanks again guys for the help, here's a shot of both the 67 and the 48....A bigger one is on my profile. Plans for the 67 include a Caddie 500/400 turbo, aux tranny, one ton dually rear, disc brakes all the way around and air bags to augment the coils in the rear... Last edited by 48 ish; 03-28-2007 at 02:03 PM.



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