Suburban Rear End Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68plus4sub · 02-29-2004, 03:41 AM

Did some searching, but couldn't find the answers, so I'll just ask...

I have a '72 C10 350/350 (2wd, 5 lug) suburban with no listed rear end option on the glove box sheet.

I have a '70 C20 350/ 4 speed (2wd, 8 lug) suburban with "no slip rear end" on the glove box sheet.

My questions are.....

1) What would the gear ratios be for each 'burb?

2) Does the "no slip" mean it's a Detroit locker?

3) Are these interchangable?

4) What differance would it make if they are interchangable?

I should also mention that it is the '72 that I am currently restoring. I'm thinking no slip would be good for the '72, cause who want to see just one black mark on the pavement!!

Blazer1970 · 02-29-2004, 09:42 AM

The 1/2 ton with a 350 would have come with 3.07 gears. Are you sure it doesn't say no-spin? That would be a Detroit Locker. I would also guess that the '70 has an Eaton with 4.10 gears - also could be 4.56.

68plus4sub · 02-29-2004, 10:37 PM

Thanks Blazer1970........anyone else have the info I'm trying to get, or know where I could look?

lukecp · 02-29-2004, 11:19 PM

If they are both coil spring rear ends i think they will interchange. However you would have 5 lugs on the front and 8 lugs on the back.

68plus4sub · 03-01-2004, 12:28 AM

I was thinking of swapping just the locker and gears if that was possible, or just the locker, not the entire housing and everything, although they are both coil spring trucks and it did momentarily cross my mind!!

lukecp · 03-01-2004, 01:04 AM

The internals are completely different and won't swap out.

68plus4sub · 03-01-2004, 01:42 AM

Thanks man, appreciate the help.

02-29-2004, 03:41 AM	#1
68plus4sub Registered User Join Date: Jan 2004 Location: Portland, Oregon Posts: 210	Suburban Rear End Questions Did some searching, but couldn't find the answers, so I'll just ask... I have a '72 C10 350/350 (2wd, 5 lug) suburban with no listed rear end option on the glove box sheet. I have a '70 C20 350/ 4 speed (2wd, 8 lug) suburban with "no slip rear end" on the glove box sheet. My questions are..... 1) What would the gear ratios be for each 'burb? 2) Does the "no slip" mean it's a Detroit locker? 3) Are these interchangable? 4) What differance would it make if they are interchangable? I should also mention that it is the '72 that I am currently restoring. I'm thinking no slip would be good for the '72, cause who want to see just one black mark on the pavement!! __________________ 1972 Chevrolet Suburban ('68 front clip), 2wd, 350/350, factory tilt 2008 Kawasaki Concours 14 1997 Harley-Davidson Soft Tail Custom 1948 Chevrolet Coupe (project) 1972 Porsche 914

02-29-2004, 09:42 AM	#2
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,507	The 1/2 ton with a 350 would have come with 3.07 gears. Are you sure it doesn't say no-spin? That would be a Detroit Locker. I would also guess that the '70 has an Eaton with 4.10 gears - also could be 4.56. __________________ Tim Last edited by Blazer1970; 02-29-2004 at 09:44 AM.

02-29-2004, 10:37 PM	#3
68plus4sub Registered User Join Date: Jan 2004 Location: Portland, Oregon Posts: 210	Thanks Blazer1970........anyone else have the info I'm trying to get, or know where I could look? __________________ 1972 Chevrolet Suburban ('68 front clip), 2wd, 350/350, factory tilt 2008 Kawasaki Concours 14 1997 Harley-Davidson Soft Tail Custom 1948 Chevrolet Coupe (project) 1972 Porsche 914

02-29-2004, 11:19 PM	#4
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	If they are both coil spring rear ends i think they will interchange. However you would have 5 lugs on the front and 8 lugs on the back. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

03-01-2004, 12:28 AM	#5
68plus4sub Registered User Join Date: Jan 2004 Location: Portland, Oregon Posts: 210	I was thinking of swapping just the locker and gears if that was possible, or just the locker, not the entire housing and everything, although they are both coil spring trucks and it did momentarily cross my mind!! __________________ 1972 Chevrolet Suburban ('68 front clip), 2wd, 350/350, factory tilt 2008 Kawasaki Concours 14 1997 Harley-Davidson Soft Tail Custom 1948 Chevrolet Coupe (project) 1972 Porsche 914

03-01-2004, 01:04 AM	#6
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	The internals are completely different and won't swap out. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

03-01-2004, 01:42 AM	#7
68plus4sub Registered User Join Date: Jan 2004 Location: Portland, Oregon Posts: 210	Thanks man, appreciate the help. __________________ 1972 Chevrolet Suburban ('68 front clip), 2wd, 350/350, factory tilt 2008 Kawasaki Concours 14 1997 Harley-Davidson Soft Tail Custom 1948 Chevrolet Coupe (project) 1972 Porsche 914

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