12 Bolt Casting Numbers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Moose67 · 10-25-2008, 10:28 PM

I need help figuring out what 12 bolt I have. Or lead me in the right direction to find the info.

The numbers on the axle tube are WE 11 12
right axle tube facing front of truck center section is 3838227
left side center section facing front is GM 5

I am doing conversion to 5 lug and need to make sure the parts will work. Thanks.

Also what is the outside diameter of a stock 67 driveshaft?

I posted this in the suspension section and got nothing. Sorry for the re-post but I need your help.

JimKshortstep4x4 · 10-26-2008, 09:01 AM

A quick check to see if (5) lug axles will fit in your 12 bolt is to measure the distance between the backing plates. The 71-72 axles are 56 1/2" between the plates while some of the 70 and older are 55".

On the drive shaft question, is your truck 2 wd or 4 wd?

Jim

Moose67 · 10-26-2008, 12:59 PM

It is a 2wd

**LockDoc** · 10-26-2008, 06:23 PM

-
You can go here and select the year in the axle codes section.

http://www.americanclassic.com/paint_test.asp

You need to double check your code though. I don't find a WE....

LockDoc

10-25-2008, 10:28 PM	#1
Moose67 Registered User Join Date: Sep 2008 Location: Borger, Texas Posts: 66	12 Bolt Casting Numbers I need help figuring out what 12 bolt I have. Or lead me in the right direction to find the info. The numbers on the axle tube are WE 11 12 right axle tube facing front of truck center section is 3838227 left side center section facing front is GM 5 I am doing conversion to 5 lug and need to make sure the parts will work. Thanks. Also what is the outside diameter of a stock 67 driveshaft? I posted this in the suspension section and got nothing. Sorry for the re-post but I need your help.

10-26-2008, 09:01 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: 12 Bolt Casting Numbers A quick check to see if (5) lug axles will fit in your 12 bolt is to measure the distance between the backing plates. The 71-72 axles are 56 1/2" between the plates while some of the 70 and older are 55". On the drive shaft question, is your truck 2 wd or 4 wd? Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC Last edited by JimKshortstep4x4; 10-26-2008 at 09:02 AM. Reason: Added wording

10-26-2008, 12:59 PM	#3
Moose67 Registered User Join Date: Sep 2008 Location: Borger, Texas Posts: 66	Re: 12 Bolt Casting Numbers It is a 2wd

10-26-2008, 06:23 PM	#4
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,420	Re: 12 Bolt Casting Numbers - You can go here and select the year in the axle codes section. http://www.americanclassic.com/paint_test.asp You need to double check your code though. I don't find a WE.... LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 11-16-2009 at 05:14 PM.



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