12 bolt - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 09-08-2012, 01:16 PM Thread Starter
 
Join Date: Sep 2012
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
12 bolt

New member here great site. I just picked up a 68 goat replacing the 66 I owned 25 years ago. The car is a one family owed but unfortunatly the son of the orginal purchaser doen't have much info on the car. One of my questions is it has a 12 bolt rear not posi but I believe limited slip. From what I've read the 68's only came with a 10 bolt is that right? I have the original window sticker and it lists a Optional Saf-T-Track diff for $42 dollars would that be the 12 Bolt?
Thanks
John
JLuger is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 09-08-2012, 06:01 PM
Administrator
 
05GTO's Avatar
 
Join Date: Oct 2004
Location: Deliverance, GA
Posts: 5,140
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Welcome to the forum, Pontiac only used a 12 bolt type-c rear end starting in 1970 and it was available only with a 455 engine.

Randy


05GTO is online now  
post #3 of 6 (permalink) Old 09-08-2012, 06:22 PM Thread Starter
 
Join Date: Sep 2012
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks Randy, I guess I have some detective work to do.
John
JLuger is offline  
 
post #4 of 6 (permalink) Old 09-08-2012, 09:26 PM
Former Moderator
 
ALKYGTO's Avatar
 
Join Date: Mar 2010
Location: Wentzville, Mo.
Posts: 2,893
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 16 Post(s)
Garage
Make sure it's a Chevy 12 bolt also (should have two cover bolts at the bottom) as opposed to an Old's "12" bolt (which is actually a "10 bolt"). Two different animals with the C type being much more desireable. The "12 bolt" designation is actually in reference to the ring gear bolts, not the cover bolts.
ALKYGTO is offline  
post #5 of 6 (permalink) Old 09-09-2012, 04:09 PM Thread Starter
 
Join Date: Sep 2012
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Would this be a Chevy?

Click image for larger version

Name:	!cid_image2.jpg
Views:	124
Size:	371.7 KB
ID:	15613

Click image for larger version

Name:	IMG_1904 (1024x768).jpg
Views:	119
Size:	556.3 KB
ID:	15614
JLuger is offline  
post #6 of 6 (permalink) Old 09-09-2012, 05:18 PM
Former Moderator
 
ALKYGTO's Avatar
 
Join Date: Mar 2010
Location: Wentzville, Mo.
Posts: 2,893
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 16 Post(s)
Garage
That looks to be the Chevy 12 bolt. I was mistaken earlier in that both the type O and type C 12 bolts have two bolts at the bottom. The Chevy version though has the "eyebrow" on the cover while the Oldsmobile is typically smooth. The only real way to absolutely determine if it is a Chevy would be to pull the cover and count the bolts on the ring gear. Chevy also has C-clip axle retention and Olds is bolt in.
ALKYGTO is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions.

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum 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 for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
AUS 9 bolt danfigg Drive train, suspension, alignment and brakes. 1 08-21-2012 08:30 PM
12 bolt billw 1964-1974 Tempest, Lemans & GTO Exhaust, Suspension, Alignment, Fuel Tank and Brakes. 3 06-06-2011 06:23 PM
Is the 10 Bolt 8.2 BOP Carrier the same as Chevy 10 Bolt? mighty454 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions. 6 04-21-2010 04:30 PM
10 Bolt Versus 12 Bolt Rear Axle take5 1964-1974 Tempest, Lemans & GTO Exhaust, Suspension, Alignment, Fuel Tank and Brakes. 10 09-28-2009 04:45 PM
69 GTO 10 bolt non-posi convert to 12 bolt posi AzStateFan 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions. 0 09-12-2009 05:34 PM

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