GM rearend identification - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-14-2006, 09:24 AM
mr52pickup's Avatar
50 Chev Truck-65 Buick Special
 

Last journal entry: more pics of dash
Last photo:
Join Date: Jun 2005
Location: Bethlehem, CT
Age: 58
Posts: 39
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
GM rearend identification

I guess it's time to ask for help. I'm trying to ID a GM 12 bolt rearend. The closest result I come up with is a '72 Suburban on an Ebay listing. Maybe one of you folks can come up with some info. Here are the facts:

On the axle tube: MJ0411W with an E stamped slightly below the MJ letters.
On the diff housing: GM5 on one side, N1 ( or I ) 3896839 on other side.
On gear inside: 3817778 11:41 GM 2-67 2

Thanks for the help.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-14-2006, 05:04 PM
Member
 
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 64
Posts: 5,103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
11:41 is the tooth counts for the gears. 41 divided by 11 = 3.73 gear ratio. The 2-67 is the manufacture date, February, 1967.

What does the rear cover look like? If it's mostly round with a wave bent into it, it's a 12-bolt car-type rear end. If it's oddly shaped, fatter on the left side than the right, it's probably the truck-type 12-bolt.

Is it set up for coil springs or leaf? If it's leaf, are the perches on the bottom or the top? What's the width, axle flange to axle flange?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-17-2006, 05:05 AM
mr52pickup's Avatar
50 Chev Truck-65 Buick Special
 

Last journal entry: more pics of dash
Last photo:
Join Date: Jun 2005
Location: Bethlehem, CT
Age: 58
Posts: 39
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
re: GM readend identification

It's about 62" from between wheel mounting surfaces. Give or take an inch, the axles aren't in it right now.
There are no spring perches on it presently. It is possible they could have been on the top; there are locations were the metal is different looking than the rest, possibly someone ground off or cleaned up the area.
Regarding the cover, it is not quite round, with the longest top-to-bottom length off center to the left, in line with the gear. It is the same cover I see in all the truck parts catalogs I have.
If this leads you to believe this is from a truck, then let me offer this other tidbit of info: I ordered wheel bearings and seals from LMC truck, with the supposed application of being for a 67 - 72 truck, and they are too large. I don't expect you to know all your part numbers, but in case you do, the bearings are #R1559-TV. This is the reason I'm trying to ID this thing, to get the right bearings. I did a quick search on the Autozone website, and they too come up with this part number for the 67-72 truck, so I'm pretty sure LMC truck did'nt send me the wrong thing.
Thanks again for your time.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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:

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

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
What GM rearend????? 30desoto Transmission - Rearend 1 04-01-2006 11:56 PM
How hard is it to rebuild a gm 8.2 rearend? batman09 Transmission - Rearend 9 12-10-2005 12:54 AM
Rearend Identification and Advice... JAHamilton Transmission - Rearend 11 10-01-2005 05:15 PM
GM rearend identification A40eh Transmission - Rearend 6 09-17-2003 07:34 PM
Rearend Identification c10_1965 Transmission - Rearend 3 06-01-2003 09:56 PM


All times are GMT -6. The time now is 02:41 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.