Parts For Sale Please read forum guidelines before posting.

12 bolt 'O' posi units back in 3 series Eaton

Old Sep 28, 2015 | 01:45 PM
  #1  
monzaz's Avatar
Thread Starter
Registered User
 
Joined: Jul 2006
Posts: 1,826
From: Richfield, Oh
12 bolt 'O' posi units back in 3 series Eaton

New 12 bolt 3 series Eaton posi units are back -

495.00 for Classic Oldsmobile.com members

shipping will depend on distance from 44286

Thanks, Jim
J D
330 990 8155 or PM me
Old Sep 28, 2015 | 04:08 PM
  #2  
Fun71's Avatar
Registered User
 
Joined: Feb 2013
Posts: 15,360
From: Phoenix, AZ
Jim,

Can you clarify which gears these are for? I know the Richmond gears are a different series than the factory Olds gears and I wanted clarification on exactly which ones fit these diffs.
Old Sep 30, 2015 | 04:07 AM
  #3  
monzaz's Avatar
Thread Starter
Registered User
 
Joined: Jul 2006
Posts: 1,826
From: Richfield, Oh
3 series ratios

3.08 3.23 GM gears
AND
Richmond 3.42 and 3.90 gears

WILL NOT fit 3.42 3.90 4.30 GM original gears.

Jim Mitschke
J D Race
Old Oct 1, 2015 | 07:10 AM
  #4  
GEARMAN69's Avatar
Registered User
 
Joined: Jan 2008
Posts: 1,482
From: ENNIS TEXAS
Jim are these 28 spline or 31 ? 8.8 Ford conversions I assume so does it need the 45/90 degree spline axles like a 71-72 8.5 or the 30/60 degree 28 splines like 70 and older type O ?
Old Oct 1, 2015 | 05:14 PM
  #5  
monzaz's Avatar
Thread Starter
Registered User
 
Joined: Jul 2006
Posts: 1,826
From: Richfield, Oh
12 bolty olds 28 spline

These are 28 spline. We have not had any slop issues with the splines on the side gear to axle fitment. These are the 8.8 ford units Yukon Eaton.

We have only one 8.8 31 spline unit left on the shelf. Standard 's' spring trac lock unit.

J D
Jim
Old Oct 4, 2015 | 02:56 PM
  #6  
Uncle Hulka's Avatar
Ancient Olds Lover
 
Joined: Mar 2007
Posts: 261
From: Connecticut
Can this directly replace the open carrier in a 1969 O-type Olds rear (12-bolt cover)? Will this accept the stock Olds axles from same?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
monzaz
Parts For Sale
0
Sep 13, 2013 10:33 PM
68Tom
Parts For Sale
1
Apr 24, 2012 12:39 PM
68Tom
Parts For Sale
0
Apr 17, 2012 10:47 AM
monzaz
Parts For Sale
0
Apr 24, 2011 06:12 PM
oldzy
Drivetrain/Differentials
1
Sep 7, 2010 05:14 AM


Thread Tools
Search this Thread

All times are GMT -7. The time now is 04:08 AM.