Rear End Help - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 01-02-2013, 11:42 PM Thread Starter
 
Josh.AZ.GTO's Avatar
 
Join Date: Jul 2009
Location: Phoenix, AZ
Posts: 362
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via AIM to Josh.AZ.GTO
Rear End Help

I've been working at keeping busy trying to do a little bit every day so while I wait for some supplies to arrive I have been tackling my rear axle, removing decades of grim and dirt.

Here is what I found and I need some assistance with the decode.

On the rear axle tube it is stamped WU 0828-K
On the pumpkin there are a few numbers as follows:

3969278, (1,F, or 4)20(and I believe a 9), and the third is GM 4 DN

I have also attached a picture of a hole I found on the pumpkin, with a pen tip to show the size of the puncture. Is this something that can easily be fixed?
Attached Thumbnails
Click image for larger version

Name:	IMG_1955.JPG
Views:	105
Size:	664.4 KB
ID:	16529  

JOSHUA
1970 GTO 455HO Cardinal Red
Josh.AZ.GTO is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 01-03-2013, 12:23 AM
 
No Goat's Avatar
 
Join Date: Dec 2012
Location: SE Michigan
Posts: 61
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If thats on top it's probably where the vent tube was. I think there should be a small metal tube there, bent so it faces down. I'd run out and look at mine right now but it's only 16 degrees out in my garage and thats just too cold for me LOL
No Goat is offline  
post #3 of 7 (permalink) Old 01-03-2013, 08:07 AM
Administrator
 
05GTO's Avatar
 
Join Date: Oct 2004
Location: Deliverance, GA
Posts: 5,011
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Josh,

WU was the rear end used in 1970, 1971 and 1972 for a 455 GTO/Lemans with 3.31 gears and an open carrier, This rear end is a type-c chevy 12 bolt. I believe the date code is a letter for the month and numbers for the day and year, F209 would be June 20, 1969. D/N should have an arrow between indicating the rear end was produced on either the day or night shift. 0828-K may be the assemble date of the car and the plant. Check that code against your PHS and/or the data plate's build date.

Randy


05GTO is online now  
post #4 of 7 (permalink) Old 01-03-2013, 11:48 AM Thread Starter
 
Josh.AZ.GTO's Avatar
 
Join Date: Jul 2009
Location: Phoenix, AZ
Posts: 362
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via AIM to Josh.AZ.GTO
Quote:
Originally Posted by No Goat View Post
If thats on top it's probably where the vent tube was. I think there should be a small metal tube there, bent so it faces down. I'd run out and look at mine right now but it's only 16 degrees out in my garage and thats just too cold for me LOL
The hole is definitely not the vent tube... I found the vent tube on the right side.

Anyone have any good articles on assembly and disassembly for these rear ends?


Sent from my iPhone using AutoGuide.com App

JOSHUA
1970 GTO 455HO Cardinal Red
Josh.AZ.GTO is offline  
post #5 of 7 (permalink) Old 01-03-2013, 11:49 AM Thread Starter
 
Josh.AZ.GTO's Avatar
 
Join Date: Jul 2009
Location: Phoenix, AZ
Posts: 362
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via AIM to Josh.AZ.GTO
Quote:
Originally Posted by No Goat View Post
If thats on top it's probably where the vent tube was. I think there should be a small metal tube there, bent so it faces down. I'd run out and look at mine right now but it's only 16 degrees out in my garage and thats just too cold for me LOL
16 degree days ..... I remember those days. Yuck. Haha.


Sent from my iPhone using AutoGuide.com App

JOSHUA
1970 GTO 455HO Cardinal Red
Josh.AZ.GTO is offline  
post #6 of 7 (permalink) Old 01-03-2013, 11:58 AM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 7,955
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
What shape is it in? If it wasn't noisy or full of metal, just do a cosmetic clean up and new axle seals. Pulling the carrier apart for service is rarely needed and is hard to dial in unless you are an expert at setting up rear axles and have the tools (press, dial indicator, knowledge). If it needs an entire rebuild (whines or is blown up) , then yeah, time to do a rebuild and add a posi. Me? I'd scrape and paint and be done with it. These rear ends can go hundreds of thousands of miles without issues, if not abused or run out of oil.
geeteeohguy is offline  
post #7 of 7 (permalink) Old 01-03-2013, 01:00 PM Thread Starter
 
Josh.AZ.GTO's Avatar
 
Join Date: Jul 2009
Location: Phoenix, AZ
Posts: 362
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Send a message via AIM to Josh.AZ.GTO
I had only driven the car a few times before the restoration began. It appeared to sound fine but the car sat for a long time exposed in Nevada. this car was covered in layers of oil and dirt. I did find a small hole in the pumpkin about the size of a ball point pen. I plan on having it evaluated at a differential shop inquiring about fixing the hole and an inspection of axles. I don't want to upgrade it.. Just want it to be safe and work smoothly. I have a 455 motor going into the car and will be built for street cruiser. Is it worth it to have the tubes welded at the pumpkin?


Sent from my iPhone using AutoGuide.com App

JOSHUA
1970 GTO 455HO Cardinal Red
Josh.AZ.GTO 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









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.




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 07:59 PM
?- looking for new rear end gears and rear suspension whytedude422 Service, Maintenance and Technical Discussion 3 03-31-2010 03:11 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