Can someone help me to identify this rear end? - Team Camaro Tech
Non-Camaro Tech Problems and Issues with your daily driver or other non-Camaro vehicles.

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old Sep 13th, 12, 03:06 PM Thread Starter
Tech Team
Super 8
 
Join Date: Sep 2010
Location: San Luis Obispo, CA
Posts: 39
Can someone help me to identify this rear end?

It came in my 1968 Firebird, and straight away I knew it was the wrong rear end. It was too wide, and was replaced recently. Now I am trying to sell it and want to know its intended application. So far I know it's a GM 10 bolt 8.5"

The codes found on the diff:
-GM30
-D209
-1254333
(could not locate any codes on the axle tubes)

From hub-to-hub it is 54.5" and wheel mounting surface-to-wheel mounting surface it is 61"

Pictures:





tumbler510 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old Sep 13th, 12, 03:37 PM
Moderator
____
 
DOUG G's Avatar
 
Join Date: Mar 1999
Location: Maryland, USA
Posts: 19,287
Garage
Send a message via MSN to DOUG G
Re: Can someone help me to identify this rear end?

Didn't see the code, but here you go....http://www.novaresource.org/axle.htm

And looks to be an 8.5"

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
DOUG G is offline  
post #3 of 9 (permalink) Old Sep 13th, 12, 04:24 PM
DjD
Retired
Dennis
 
DjD's Avatar
 
Join Date: Apr 1999
Location: Fortuna, CA
Posts: 26,436
Garage
Re: Can someone help me to identify this rear end?

With the dimensions he posted it's not Nova Doug...

...Dennis

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


"Don't take life so serious, you won't get out alive..."
DjD is offline  
 
post #4 of 9 (permalink) Old Sep 13th, 12, 09:17 PM Thread Starter
Tech Team
Super 8
 
Join Date: Sep 2010
Location: San Luis Obispo, CA
Posts: 39
Re: Can someone help me to identify this rear end?

Quote:
Originally Posted by DjD View Post
With the dimensions he posted it's not Nova Doug...
Yeah, the dimensions are too wide for a Nova. The replacement axle that I put into my '68 Firebird was from a similar yeared Nova, and it fits like a glove.

Just measured center spring perch to center spring perch. 45"

Last edited by tumbler510; Sep 13th, 12 at 09:41 PM.
tumbler510 is offline  
post #5 of 9 (permalink) Old Sep 13th, 12, 10:59 PM
Gold Lifetime Member
John
 
Vintage 68's Avatar
 
Join Date: Mar 2002
Location: Moraga,Ca.,USA
Posts: 13,705
Wink Re: Can someone help me to identify this rear end?

Looks like a 1979 Firebird rear axle.

The assembly and application code should be here - Click image for larger version

Name:	1979 Firebird rear axle.jpg
Views:	1324
Size:	85.3 KB
ID:	30050
They can be a real bear to find on some units - very lightly stamped and rusting doesn't help ...

1968 Convertible
Some trucks
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Other V8 things - some of which float
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Other V6 things - none of which float
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Oh yeah, and 1 "Straight-Six" ...
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


If a man says something in the garage - and his wife can't hear him - is he still wrong !!!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Vintage 68 is offline  
post #6 of 9 (permalink) Old Sep 14th, 12, 08:28 AM Thread Starter
Tech Team
Super 8
 
Join Date: Sep 2010
Location: San Luis Obispo, CA
Posts: 39
Re: Can someone help me to identify this rear end?

Quote:
Originally Posted by Vintage 68 View Post
Looks like a 1979 Firebird rear axle.

The assembly and application code should be here - Attachment 30050
They can be a real bear to find on some units - very lightly stamped and rusting doesn't help ...
Thanks. I power washed it yesterday, but didnt see any more numbers besides the ones on the diff itself. Ill go out with a wire brush today and go to town. I found a chart here (http://www.oldsmobility.com/old/10bolt-tech.htm) that says the applications of this axle are: 70-76 Chevrolet
70-76 Chevelle
70-75 Chevy II
70-81 Camaro
70-81 GTO/Firebird
70-76 Olds F-85
72-81 Z-28

Which works with your theory.m

Are the numbers indented into the metal, or raised?
tumbler510 is offline  
post #7 of 9 (permalink) Old Sep 18th, 12, 08:04 AM
Gold Lifetime Member
John
 
Vintage 68's Avatar
 
Join Date: Mar 2002
Location: Moraga,Ca.,USA
Posts: 13,705
Thumbs up Re: Can someone help me to identify this rear end?

They are 'stamped' in axle tube.
For some reason the guy doing almost all the 1970's rear axles did a very poor job of wacking the gang stamp holder with a hammer
Most are very hard to read and years of weather and rust sure don't help ...

Here's a 1977 axle stamp to compare - Click image for larger version

Name:	Rear Axle TAC code 1977 X-body date code.jpg
Views:	992
Size:	65.2 KB
ID:	30090
While you can read the ratio and application code, the date is almost unreadable

1968 Convertible
Some trucks
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Other V8 things - some of which float
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Other V6 things - none of which float
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Oh yeah, and 1 "Straight-Six" ...
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


If a man says something in the garage - and his wife can't hear him - is he still wrong !!!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Vintage 68 is offline  
post #8 of 9 (permalink) Old Dec 18th, 12, 08:18 PM
Senior Tech
Brian
 
PA Camaro Guy's Avatar
 
Join Date: Apr 2008
Location: PA
Posts: 642
Re: Can someone help me to identify this rear end?

Quote:
Originally Posted by tumbler510 View Post
70-76 Chevelle
70-75 Chevy II
70-81 Camaro
70-81 GTO/Firebird
70-76 Olds F-85
72-81 Z-28
I'd trend toward the upper end of the date range as suggested if that cover is original. I think GM started out with the crinkle cover (lateral fold cast into it) thinking it assisted with oiling the gears and when it was found that there was no meaningful benefit, they changed the cover design. Can confirm that the 1970 diffs had covers with the crinkle. I happen to have a '70 12 bolt camaro rear under my '69. (don't ask)

1969 Camaro 383
2.02/1.63 & 234/244 Vortec
TH350 / 12 bolt 3.73
PA Camaro Guy is offline  
post #9 of 9 (permalink) Old Dec 19th, 12, 11:46 PM
Senior Tech
 
Join Date: May 2001
Location: Ashby,MN, USA
Posts: 8,305
Re: Can someone help me to identify this rear end?

looks like an 8.5 out of a 77ish-81 Trans Am or Z/28.. at least if the disc brake brackets are stock..
if it's got 3.42 gears it's worth a little more than if it's got something like 2.56 gears. count the teeth on the ring gear and divide that by the number of teeth on the pinion gear to see what the ratio is.

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
novaderrik is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro 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 we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome