ClassicOldsmobile.com  

Go Back   ClassicOldsmobile.com > Repair & Restoration > Transmission and Driveline > Drivetrain/Differentials
Sign in using an external account
Register Forgot Password?
Search

Welcome to Classic Oldsmobile Forum!
Welcome to Classic Oldsmobile forum,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Classic Oldsmobile Forum today!


Reply
 
 
 
submit to reddit
 
LinkBack Thread Tools Search this Thread Display Modes
Old August 31st, 2011, 09:50 AM   #1 (permalink)
Registered User
 
Jolly Green's Avatar
 
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 208
1968 Olds 442 Rearend

Anybody know the options available for a 1968 Olds 442 rearend? Posi? Gear ratio, etc? My 442 has the 12 Bolt cover but I understand those can actually be 10 bolt diffs correct? Just wondering what I will find when I get home from Afghanistan and pop the cover to rebuild it. I am pretty sure, when I worked on it a few years ago, that when I spun one wheel, the other spun the opposite direction.
__________________
First Muscle Car
'68 442
Tucson, AZ
My Cardomain Page
Jolly Green is offline   Reply With Quote
Old August 31st, 2011, 10:31 AM   #2 (permalink)
Registered User
 
Dave Siltman's Avatar
 
Join Date: Jan 2009
Location: maryland
Posts: 989
If that '68 was built in Canada (look for that on the data plate under the hood) it would've originally had a "C" (Chevy) type rear end. The options and possible variations would differ. Determine what style you have before you obtain any wrong info. or parts.
Dave Siltman is offline   Reply With Quote
Old August 31st, 2011, 11:16 AM   #3 (permalink)
Trying to remember member
 
wmachine's Avatar
 
Join Date: Oct 2005
Location: Ohio
Posts: 4,064
Check the Chassis Service Manual and the Product Information Manual (aka Assembly Manual), both you'll find for FREE on Wild About Cars.

Wild About Cars. http://wildaboutcars.com. An information supersource, especially Oldsmobile. More Olds content than anywhere else on the internet and continuing to grow.
You'll find Chassis Service Manuals, Product Information Manuals (AKA Assembly Manuals), Inspector's Manuals, and other documents that will contain this and much much more.
Dealer Brochures, magazine ads and articles, and a home page for you online. You can even have your very own club there and a personal forum.
Free to join, free to learn.
wmachine is offline   Reply With Quote
Old August 31st, 2011, 02:25 PM   #4 (permalink)
Randy C.
 
rcorrigan5's Avatar
 
Join Date: Feb 2009
Location: Olympia, WA
Posts: 1,414
There were two types of differentials in '68. One was the "O" axle with gear ratios of 2.56, 2.78, 3.08, 3.23, 3.42, and 3.91 in either an "open" or "anti-spin" version. There was also an "O" axle 4.33 gear in just the "anti-spin" version (I believe the 4.33 gears were dealer-installed). The other type of differential was referred to as the "C" axle and was used in Canadian built vehicles in gear ratios 2.56, 2.73, 3.07 and 3.31, in either "open" or "anti-spin".

There should be a two-letter or a letter-digit code on your axle housing that will tell you what gear ratio you have. Most of the time I've found it stamped upside-down on the passenger side forward.

Check the 7th figure in your VIN. If it is the number "1", your car is Canadian-built. If there is a letter in that position, your car was built in the USA and that letter will tell you which assembly plant built your car.

As "wmachine" said, a great place to go is www.wildaboutcars.com. There is a host of info at that site that you can view and download for free. Signing up is also free. I highly recommend it!

Randy C.
'68 4-4-2 convertible
'69 4-4-2 convertible
'70 GTO hardtop
'71 Corvette coupe
Attached Images
File Type: jpg Olds68442conv7.jpg (25.8 KB, 6 views)
rcorrigan5 is offline   Reply With Quote
Old August 31st, 2011, 02:25 PM
ClassicOldsmobile
1957 Oldsmobile




Paid Advertisement
 
 
 
submit to reddit
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
10 bolt 3:42 posi 8.5 GN - 442 rearend Bob Kelso Parts For Sale 0 July 1st, 2011 07:01 AM
1968 Olds 442 Hood ($350) NightStalker Parts For Sale 0 March 19th, 2011 07:53 PM
12 bolt posi rearend from 70 w31 442 Make offer Curth Parts For Sale 9 September 22nd, 2010 07:28 AM
1968 olds 442 steveolds68 442 2 July 27th, 2010 08:39 AM
64 olds 98 rearend... willz64 Drivetrain/Differentials 5 April 27th, 2010 10:06 AM


All times are GMT -7. The time now is 03:59 PM.


Advertising - Privacy Statement - Terms of Service - Jobs
All content Copyright 2008 by Internet Brands, Inc.

Search Engine Friendly URLs by vBSEO 3.5.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62