just checked out my rear - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Purs · 04-05-2003, 01:27 PM

on my 2wd 72. Couldn't see any tag attached but did see a GM60 stamped onto the front of the the diff. Then I checked my 4x4 and it said GM56 on the rear diff and couldn't see anything on the front diff. What rear ends do I have?

Purs · 04-06-2003, 10:46 PM

somebody has to know what these numbers mean?? help!

casey · 04-07-2003, 02:02 AM

I'm curious as well

Tynee · 04-07-2003, 09:08 AM

hehehe, sorry, I'm no help, I just thought I'd see if my mental pic of you looking over your shoulder at a mirror checkin' out your rear was correct. Guess not. My wife says mine looks good, but I suspect she's lying.

Blue Beard · 04-07-2003, 01:32 PM

Have to go with Tynee on this one......let the women check it...............

MandarinSixSeven · 04-07-2003, 02:56 PM

Could the GM60 mean its a Dana 60 rear-end? I don't know, that's a very wild guess

**1971Stepside** · 04-07-2003, 03:42 PM

You will need to pull the numbers located on the axle tube passenger side (on top) to know for sure. At least that is where the 12 bolt numbers are located.

andyr354 · 04-07-2003, 04:47 PM

You can tell if it is a 60 or a 12-bolt by the shape of the cover pretty easy.
http://www.yjoffroad.com/axleid.html

The 60 and 70 look the same (you would have a 60 though).

Andy

LudwigTheMad · 04-07-2003, 10:05 PM

I think you should leave checking out your rear end to profesional MD's....you never know what kind of diseases you could get.....

lol

If you just need to know the gear ratio, there is a way to get that info...and whethor or not it's posi.......

E-mail me if you need to know how to do this (I'm pressed for time or I would post it...)

Purs · 04-07-2003, 10:40 PM

I found the numbers:

2wd is a DANA 60 (I think) NF 6893868

4wd is ?? N 6893869

Anyone?

casey · 04-07-2003, 11:21 PM

Wheres that mikep when you need him,hes the rear end specialist, trucks that is

04-05-2003, 01:27 PM	#1
Purs Got Big Block? Join Date: Apr 2000 Location: West Texas Posts: 1,510	just checked out my rear on my 2wd 72. Couldn't see any tag attached but did see a GM60 stamped onto the front of the the diff. Then I checked my 4x4 and it said GM56 on the rear diff and couldn't see anything on the front diff. What rear ends do I have? __________________ "Experience is what you get when you didn't get what you wanted."

04-06-2003, 10:46 PM	#2
Purs Got Big Block? Join Date: Apr 2000 Location: West Texas Posts: 1,510	somebody has to know what these numbers mean?? help! __________________ "Experience is what you get when you didn't get what you wanted."

04-07-2003, 09:08 AM	#4
Tynee I miss this truck. Join Date: Dec 2001 Location: Lexington, KY U.S.A. Posts: 2,863	hehehe, sorry, I'm no help, I just thought I'd see if my mental pic of you looking over your shoulder at a mirror checkin' out your rear was correct. Guess not. My wife says mine looks good, but I suspect she's lying. __________________ '07 GMC Acadia SLT. Sweet ride. '08 Crew Cab Z-71 short bed. Really like this truck A LOT.

04-07-2003, 01:32 PM	#5
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,831	Have to go with Tynee on this one......let the women check it............... __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

04-07-2003, 02:56 PM	#6
MandarinSixSeven Seasonal Poster Join Date: Apr 2002 Location: Kelowna BC Canada Posts: 896	Could the GM60 mean its a Dana 60 rear-end? I don't know, that's a very wild guess __________________ 67 GMC Short Step 350/4-Speed/3.08 Posi Front/Rear Sway Bars Kelowna BC, Canada Member of DTPW

04-07-2003, 02:02 AM	#3
casey Registered User Join Date: Jan 2003 Location: Kelowna B.C. Canada Posts: 2,048	I'm curious as well

04-07-2003, 03:42 PM	#7
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,932	You will need to pull the numbers located on the axle tube passenger side (on top) to know for sure. At least that is where the 12 bolt numbers are located. __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

04-07-2003, 04:47 PM	#8
andyr354 Registered User Join Date: Mar 2003 Location: Mahaska, KS Posts: 82	You can tell if it is a 60 or a 12-bolt by the shape of the cover pretty easy. http://www.yjoffroad.com/axleid.html The 60 and 70 look the same (you would have a 60 though). Andy __________________ 1970 C10: 2WD, LWB, 350, 350 auto, Headers, Duals, Edelbrock 1406 with 2101 intake, and optional rust.

04-07-2003, 10:05 PM	#9
LudwigTheMad Registered User Join Date: May 2000 Location: Ramona, CA Posts: 2,033	I think you should leave checking out your rear end to profesional MD's....you never know what kind of diseases you could get..... lol If you just need to know the gear ratio, there is a way to get that info...and whethor or not it's posi....... E-mail me if you need to know how to do this (I'm pressed for time or I would post it...) __________________ That's right, I'm back in the game again. No it's not pink..... 1972 Blue and White Suburban.

04-07-2003, 10:40 PM	#10
Purs Got Big Block? Join Date: Apr 2000 Location: West Texas Posts: 1,510	I found the numbers: 2wd is a DANA 60 (I think) NF 6893868 4wd is ?? N 6893869 Anyone? __________________ "Experience is what you get when you didn't get what you wanted."

04-07-2003, 11:21 PM	#11
casey Registered User Join Date: Jan 2003 Location: Kelowna B.C. Canada Posts: 2,048	Wheres that mikep when you need him,hes the rear end specialist, trucks that is



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