Rear axel id - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 05-02-2012, 07:35 PM Thread Starter
 
66goatframeoff's Avatar
 
Join Date: Nov 2011
Location: Brandon FLA
Posts: 120
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rear axel id

Bought a 66 LeMans 4 door parts car suprised to find a 10 bold posi under it but still can't find the letter codes without tearing it apart how can I tell the gear ratio ? 9783393 c166 only thing I can find.
66goatframeoff is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 05-02-2012, 07:54 PM
 
68GTO4004Spd's Avatar
 
Join Date: Jun 2008
Location: Columbus, OH
Posts: 659
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 1 Post(s)
You could spin the pinion one rev and count how many revs the left wheel makes. 3 1/2 times is roughly 3:55. Or you could take the pumpkin cover off and find the ratio stamped on the ring gear. In the pic 39 divided by 11 is 3:55 gear. Sorry site too slow for the pic to load, the stamp will be the first 4 numbers 39-11 GM 6 70 1
68GTO4004Spd is offline  
post #3 of 5 (permalink) Old 05-06-2012, 07:49 PM Thread Starter
 
66goatframeoff's Avatar
 
Join Date: Nov 2011
Location: Brandon FLA
Posts: 120
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
found ring gear stamp 14114 gm2 66e is it a 411 ? the math does not work out ?know its eaton 66 .thanx for the help.
66goatframeoff is offline  
 
post #4 of 5 (permalink) Old 05-06-2012, 09:06 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)
Quote:
Originally Posted by 66goatframeoff View Post
found ring gear stamp 14114 gm2 66e is it a 411 ? the math does not work out ?know its eaton 66 .thanx for the help.
It may be a 2.93, (41 divided by 14)

Randy


05GTO is online now  
post #5 of 5 (permalink) Old 05-08-2012, 12:53 PM
 
68GTO4004Spd's Avatar
 
Join Date: Jun 2008
Location: Columbus, OH
Posts: 659
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 1 Post(s)
spin the pinion and count the rotations, that will tell you if it 411 or 293 for sure
68GTO4004Spd 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
Hard to see rear of goat through inside rear view mirror common right?.... pctek 2004-2006 GTO General Discussion 8 11-22-2010 08:59 PM
rear axel revup47 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions. 2 05-02-2010 12:09 PM
?- looking for new rear end gears and rear suspension whytedude422 Service, Maintenance and Technical Discussion 3 03-31-2010 04:11 AM

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