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08-29-2012, 09:50 PM
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#1 |
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Registered User
Join Date: Mar 2012
Location: San Antonio, Tx
Posts: 784
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Dana 70 in my 74?
Okay well i was under my truck looking at why my bed wasnt lining up with my cab, when i decided to see what kind of rear end i have
after what seemed to be a whole can of carb cleaner i see these numbers on the left side of the axle 38968 i think and on the right side GM 70, and on the back by the cover 70 Is it a Dana 70 in the rear of my truck? my truck is 74 chevy c10 swb 5 lug 8 leaf springs 12 bolts im stumped on this I started looking after seeing a few post on here saying you can find what axle you have by the numbers on it unless 70 is the year? |
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08-29-2012, 10:15 PM
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#2 |
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Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
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Re: Dana 70 in my 74?
It should be a 12 bolt. I'm not sure what the 70 is on your rear end, but the D70 itself is a monster of an axle and utilizes 8 lugs. It's pretty much a dually only rear, too.
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Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 
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08-29-2012, 10:22 PM
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#3 |
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Registered User
Join Date: Mar 2012
Location: San Antonio, Tx
Posts: 784
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Re: Dana 70 in my 74?
I was thinking what is it
I see it in two locations Gm 70 in the front by the drive shaft along with those other.numbers And 70 in the rear by cap I've been looking online for like 30 minutes and it keeps bringing me up to it.being a Dana 70, but I see it only has 5 lugs, I'm stumped Posted via Mobile Device |
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08-29-2012, 10:47 PM
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#4 |
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Registered User
Join Date: May 2008
Location: Waukesha, WI
Posts: 904
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Re: Dana 70 in my 74?
Post some pictures of it
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70 stepside 76 blazer 86 Silverado 20 Max Trailering 6.2 Crew 71 Nova SS My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=363634 |
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08-29-2012, 11:06 PM
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#5 |
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Registered User
Join Date: Mar 2012
Location: San Antonio, Tx
Posts: 784
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Re: Dana 70 in my 74?
   this is the only thing i have will try to get some pics tommarow its already dark outside |
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08-30-2012, 10:54 PM
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#6 |
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Registered User
Join Date: May 2008
Location: Waukesha, WI
Posts: 904
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Re: Dana 70 in my 74?
I meant pics of the axle itself, including pics of the pumpkin
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70 stepside 76 blazer 86 Silverado 20 Max Trailering 6.2 Crew 71 Nova SS My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=363634 |
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08-30-2012, 11:54 PM
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#7 |
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Registered User
Join Date: Mar 2012
Location: San Antonio, Tx
Posts: 784
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Re: Dana 70 in my 74?
sorry here are the best pics i could get
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08-31-2012, 02:02 AM
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#8 | |
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Registered User
Join Date: Nov 2011
Location: rock springs wyoming
Posts: 182
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Re: Dana 70 in my 74?
Quote:
Thats a 12 bolt not a dana 70 |
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08-31-2012, 02:04 AM
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#9 |
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Registered User
Join Date: Nov 2011
Location: rock springs wyoming
Posts: 182
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Re: Dana 70 in my 74?
heres a dana 70
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08-31-2012, 03:16 AM
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#10 |
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Second Chance Program
Join Date: Jun 2006
Location: Portland, OR
Posts: 2,642
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Re: Dana 70 in my 74?
As others have said, thats a standard 12 bolt. Not D70.
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90 Chevy Suburban 2500 5.3 swap/th400/np241/14bltSF/10blt. 77 C20 crew cab Silverado. 396/th400. In work. |
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08-31-2012, 09:47 AM
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#11 |
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Registered User
Join Date: Mar 2012
Location: San Antonio, Tx
Posts: 784
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Re: Dana 70 in my 74?
now im super puzzled what does that GM70 mean???
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08-31-2012, 11:20 AM
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#12 | |
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Registered User
Join Date: May 2010
Location: Lewis County, WA
Posts: 1,523
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Re: Dana 70 in my 74?
Quote:
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08-31-2012, 12:46 PM
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#13 |
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Registered User
Join Date: Mar 2012
Location: San Antonio, Tx
Posts: 784
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Re: Dana 70 in my 74?
Lets just say it can withstand 70 G' s of force lol
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08-31-2012, 12:55 PM
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#14 |
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Registered User
Join Date: Nov 2011
Location: rock springs wyoming
Posts: 182
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Re: Dana 70 in my 74?
that means it was cast in the 70's. not when it was built for your truck just when the housing was cast. u need to get more number off it to find out more info on your rear end, but it is a chevy 12 bolt rear end. same as a 4x4 axles just have to put 6 lug axles in it and it will work. they are a good axles to have.
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09-01-2012, 03:19 PM
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#15 |
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Registered User
Join Date: Nov 2010
Location: Windsor Locks
Posts: 628
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Re: Dana 70 in my 74?
The factory 12 bolt in my 76 had GM73 cast into in and I had to replace it after getting rearended broke the housing. The 12 bolt I replaced it with has GM79 cast into it. Im guessing there were casting changes over the years and those are mold year dates.
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09-01-2012, 08:33 PM
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#16 | |
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Registered User
Join Date: Nov 2011
Location: rock springs wyoming
Posts: 182
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Re: Dana 70 in my 74?
Quote:
The GM73 is the year the center housing was cast and the GM79 was cast in 79. the GM73 was cast in 73 they didnt change or any thing they just made more. |
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09-02-2012, 10:37 AM
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#17 |
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Registered User
Join Date: Nov 2010
Location: Windsor Locks
Posts: 628
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Re: Dana 70 in my 74?
I see, that makes sense.
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09-02-2012, 11:45 AM
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#18 |
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Registered User
Join Date: Oct 2011
Location: fortwayne, indiana
Posts: 209
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Re: Dana 70 in my 74?
all dana axles run 10 bolts on the cover but not all 10 bolt axles are dana (gm 10 bolt, f*** 8.8 and so on)
heres a dana 70 in my 1980 cab and chassis the dana 70 is a bit taller then the gm 12 bolt
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88 gmc v3500 bonus cab classy chassy conversion, 454, nv4500, np205, dana 60 front with spool, 14 bolt ff cac rear with locker. |
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09-03-2012, 05:19 AM
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#19 |
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Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: Dana 70 in my 74?
How to id a rear end http://coloradok5.com/axleguide.shtml
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