12 bolt codes / casting numbers and rear axle ? help - Chevelle Tech
Chevelle Tech join team chevelle as a supporting member  
Chevelle Parts at SS396.com      
GROUND UP & SS396.com         
Official Sponsor of Team Chevelle
     

Auto Insurance

Chevelles.com is the premier Chevrolet Chevelle Forum on the internet. Registered Users do not see the above ads.
Tag Team De-coding cowl tags and vin numbers.

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old Jan 27th, 12, 7:00 PM
oliver69 oliver69 is offline
Tech Team
OLIVER
 
Join Date: Dec 2010
Location: ITALY
Posts: 736
Default 12 bolt codes / casting numbers and rear axle ? help

Hello guys, i crawled under the car , cleaned the housing found some codes , i need some help please to de-code-i did a search on the web but i can come up with nothing certain... so here are the numbers ;

looking from the back at the 12 bolt housing
(driver side) top left 12 on top and 67880 just below
(passenger side) bottom right corner 55 L 4 8 or B

the only thing I decoded is L 4 8 - could be december 4 th 1968 , correct ? 55 ?

i ve been tryng to find the rear axle codes in order to find out the gear ratio but this code should be on the other side of the rear shaft , so i guess i need to raise the car somehow to find those numbers

thanks for any help...
__________________
Oliver
Milano , ITALY
www.wishmilano.com


1969 396 SS monaco orange (72)
468 Vortecpro 585 HP
4 speed manual - 3.31s
ACES # 09607

http://i1062.photobucket.com/albums/...6/foto2-74.jpg

http://www.youtube.com/watch?v=xkVAGrF7TSo

http://www.youtube.com/watch?v=whEF3...hannel&list=UL
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old Jan 27th, 12, 7:15 PM
Mike Mike is offline
Lifetime Premium Member
& Moderator
 
Join Date: Apr 2005
Location: North America
Posts: 14,737
Default Re: 12 bolt codes / casting numbers and rear axle ? help

http://chevellestuff.net/qd/generic_rear_axle_info.htm
http://chevellestuff.net/qd/all_axle_codes.htm
__________________

Reply With Quote Quick reply to this message
  #3  
Old Jan 27th, 12, 7:25 PM
oliver69 oliver69 is offline
Tech Team
OLIVER
 
Join Date: Dec 2010
Location: ITALY
Posts: 736
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Hi , yes... This is where i was looking and i decoded - L 4 8

but the other numbers i have are not there or maybe i m not finding them .... nor the axle codes
__________________
Oliver
Milano , ITALY
www.wishmilano.com


1969 396 SS monaco orange (72)
468 Vortecpro 585 HP
4 speed manual - 3.31s
ACES # 09607

http://i1062.photobucket.com/albums/...6/foto2-74.jpg

http://www.youtube.com/watch?v=xkVAGrF7TSo

http://www.youtube.com/watch?v=whEF3...hannel&list=UL
Reply With Quote Quick reply to this message
  #4  
Old Jan 27th, 12, 7:28 PM
Mike Mike is offline
Lifetime Premium Member
& Moderator
 
Join Date: Apr 2005
Location: North America
Posts: 14,737
Default Re: 12 bolt codes / casting numbers and rear axle ? help

The housing code and location is in the first link and the axle codes are in the second link -posted by year.
Some of the numbers you posted are just foundry marking and don't mean anything to the end user.
__________________

Reply With Quote Quick reply to this message
  #5  
Old Jan 27th, 12, 7:47 PM
oliver69 oliver69 is offline
Tech Team
OLIVER
 
Join Date: Dec 2010
Location: ITALY
Posts: 736
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Mike thanks , so those numbers are just foundry numbers... so in the following link there is the " codes location " but i scraped and cleaned i found nothing... could it be its on the other side ?

http://www.chevelles.com/years/69/69rearcodes.html
__________________
Oliver
Milano , ITALY
www.wishmilano.com


1969 396 SS monaco orange (72)
468 Vortecpro 585 HP
4 speed manual - 3.31s
ACES # 09607

http://i1062.photobucket.com/albums/...6/foto2-74.jpg

http://www.youtube.com/watch?v=xkVAGrF7TSo

http://www.youtube.com/watch?v=whEF3...hannel&list=UL
Reply With Quote Quick reply to this message
  #6  
Old Jan 27th, 12, 8:05 PM
Mike Mike is offline
Lifetime Premium Member
& Moderator
 
Join Date: Apr 2005
Location: North America
Posts: 14,737
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Look on the front of the passenger side axle tube for the code about half way between the center section and the brake backing plate..
Didn't realize Dale was showing it on the back of the tube ,close to the center section.
I wouldn't trust the code to be what's inside a 43 year old rear ,I'd pull the cover and get the gear info.
The rear could probably use a lube change after 43 years
__________________

Reply With Quote Quick reply to this message
  #7  
Old Jan 27th, 12, 8:17 PM
Lionel-n-Chevelles Lionel-n-Chevelles is offline
Gold Founding Member
 
Join Date: Nov 2005
Location: Camaro-n-Chevelle Heaven
Posts: 3,516
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Hi Oliver,
With a Foundry Date of December 4, 1968, your Casting Number should be 3917124.
__________________
Tory
ACES Member #1890
Team Chevelle Gold #288

1964 Malibu SS Unrestored 36,000 Mile Survivor
1964 Malibu SS Hardtop
1966 Chevelle SS 396 Unrestored 76,000 Mile Survivor
1968 Malibu L-79, 1 of 4082 - SOLD
1955 Chevrolet Bel Air Unrestored 15,000 Mile Survivor
1955 Chevrolet Nomad
1984 Hurst Olds w/ Factory Sunroof, 1 of 99
1985 442 White / Grey w/ Factory Sunroof - SOLD
Reply With Quote Quick reply to this message
  #8  
Old Jan 27th, 12, 8:32 PM
oliver69 oliver69 is offline
Tech Team
OLIVER
 
Join Date: Dec 2010
Location: ITALY
Posts: 736
Default Re: 12 bolt codes / casting numbers and rear axle ? help

I guess i have to take the car to the garage i think its impossible to crawl under to look at the front side of the shafts ... but anyway thanks for the help .. and let you know if i find anything... ciao
__________________
Oliver
Milano , ITALY
www.wishmilano.com


1969 396 SS monaco orange (72)
468 Vortecpro 585 HP
4 speed manual - 3.31s
ACES # 09607

http://i1062.photobucket.com/albums/...6/foto2-74.jpg

http://www.youtube.com/watch?v=xkVAGrF7TSo

http://www.youtube.com/watch?v=whEF3...hannel&list=UL
Reply With Quote Quick reply to this message
  #9  
Old Jan 27th, 12, 11:53 PM
71malibu400 71malibu400 is offline
Lifetime Premium Member
Joe
 
Join Date: Nov 2006
Location: feasterville,pa
Posts: 422
Send a message via Yahoo to 71malibu400
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Quote:
Originally Posted by Mike View Post
Look on the front of the passenger side axle tube for the code about half way between the center section and the brake backing plate..
Didn't realize Dale was showing it on the back of the tube ,close to the center section.
I wouldn't trust the code to be what's inside a 43 year old rear ,I'd pull the cover and get the gear info.
The rear could probably use a lube change after 43 years
X2!
__________________
TC #3738
ACES #07845
Lower Bucks AACA
PACC-Pa Chevelle club
71 Malibu 400 402BB 17,600 original miles
71 GMC Sprint
Reply With Quote Quick reply to this message
  #10  
Old Jan 28th, 12, 12:54 PM
DaleM DaleM is offline
Gold Founding Member
Dale
 
Join Date: Aug 1998
Location: Lawton, Oklahoma
Posts: 18,232
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Quote:
Originally Posted by Mike View Post
Look on the front of the passenger side axle tube for the code about half way between the center section and the brake backing plate..
Didn't realize Dale was showing it on the back of the tube ,close to the center section.
I wouldn't trust the code to be what's inside a 43 year old rear ,I'd pull the cover and get the gear info.
The rear could probably use a lube change after 43 years
The link, http://www.chevelles.com/years/69/69rearcodes.html , is here on TC, not my website.

I do have a rear end from a 67 Chevelle showing the stamped location at http://chevellestuff.net/qd/generic_rear_axle_info.htm however.
__________________
TC Gold #92 ~ August 1998
* I only report what I read. If they're wrong, I'm wrong.
* ChevelleStuff - Decoding info for 64-72
* 1966/1967 Chevelle Reference CD
* Chevelle Registeries
* Buildsheet Data Collection
Reply With Quote Quick reply to this message
  #11  
Old Jan 28th, 12, 12:59 PM
Mike Mike is offline
Lifetime Premium Member
& Moderator
 
Join Date: Apr 2005
Location: North America
Posts: 14,737
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Sorry for the mis-direct Dale.
__________________

Reply With Quote Quick reply to this message
  #12  
Old Jan 28th, 12, 1:09 PM
DaleM DaleM is offline
Gold Founding Member
Dale
 
Join Date: Aug 1998
Location: Lawton, Oklahoma
Posts: 18,232
Default Re: 12 bolt codes / casting numbers and rear axle ? help

__________________
TC Gold #92 ~ August 1998
* I only report what I read. If they're wrong, I'm wrong.
* ChevelleStuff - Decoding info for 64-72
* 1966/1967 Chevelle Reference CD
* Chevelle Registeries
* Buildsheet Data Collection
Reply With Quote Quick reply to this message
  #13  
Old Jan 28th, 12, 4:47 PM
oliver69 oliver69 is offline
Tech Team
OLIVER
 
Join Date: Dec 2010
Location: ITALY
Posts: 736
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Dale, sorry i m getting confused - where are the codes on back or on front side of the tube ? - passenger - left side- looking at the car from the back
I scrubbed really hard on the back but have not found any ...
Thank you for the help
__________________
Oliver
Milano , ITALY
www.wishmilano.com


1969 396 SS monaco orange (72)
468 Vortecpro 585 HP
4 speed manual - 3.31s
ACES # 09607

http://i1062.photobucket.com/albums/...6/foto2-74.jpg

http://www.youtube.com/watch?v=xkVAGrF7TSo

http://www.youtube.com/watch?v=whEF3...hannel&list=UL
Reply With Quote Quick reply to this message
  #14  
Old Jan 28th, 12, 4:58 PM
DaleM DaleM is offline
Gold Founding Member
Dale
 
Join Date: Aug 1998
Location: Lawton, Oklahoma
Posts: 18,232
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Quote:
Originally Posted by oliver69 View Post
Dale, sorry i m getting confused - where are the codes on back or on front side of the tube ? - passenger - left side- looking at the car from the back
I scrubbed really hard on the back but have not found any ...
Thank you for the help
{edit - added photo}

The STAMPED codes are suppose to be on the passenger side front of the axle housing. These are not gang stamped and they're often not real deep either. GM parts book says they should be 8"-10" inboard of the backing plate but GM (itself) often didn't stamp them so there's no real measurement to go by. As you can see from teh photo I have of the 67 on that page, the stamping is more towards the center section but that's just from that person, that day, at that plant.

Again, road grime and paint from someone wishing to spruce up the looks underneath can make it hard to find.

__________________
TC Gold #92 ~ August 1998
* I only report what I read. If they're wrong, I'm wrong.
* ChevelleStuff - Decoding info for 64-72
* 1966/1967 Chevelle Reference CD
* Chevelle Registeries
* Buildsheet Data Collection
Reply With Quote Quick reply to this message
  #15  
Old Jan 28th, 12, 5:03 PM
oliver69 oliver69 is offline
Tech Team
OLIVER
 
Join Date: Dec 2010
Location: ITALY
Posts: 736
Default Re: 12 bolt codes / casting numbers and rear axle ? help

Great Dale, all is clear now..I ll try to find them ...have nothing better to do in rainy sundays anyway... Thanks again ciao
__________________
Oliver
Milano , ITALY
www.wishmilano.com


1969 396 SS monaco orange (72)
468 Vortecpro 585 HP
4 speed manual - 3.31s
ACES # 09607

http://i1062.photobucket.com/albums/...6/foto2-74.jpg

http://www.youtube.com/watch?v=xkVAGrF7TSo

http://www.youtube.com/watch?v=whEF3...hannel&list=UL
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply
Chevelle Tech > General Tech Area > Tag Team      Current Topic: 12 bolt codes / casting numbers and rear axle ? help
Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:48 AM.


Is there a site like this for?    El Caminos Camaros Novas Impalas GTO Chevy Punch All Chevys

2009 Team Chevelle - AutoForums