#41  
Old 01-13-2022, 08:44 PM
72pontiac's Avatar
72pontiac 72pontiac is offline
Chief Ponti-yacker
 
Join Date: Jun 2006
Location: Waterford Mi.
Posts: 646
Default

Oh that was a reply to the guy with a Buick. I see now.

  #42  
Old 01-13-2022, 08:48 PM
72pontiac's Avatar
72pontiac 72pontiac is offline
Chief Ponti-yacker
 
Join Date: Jun 2006
Location: Waterford Mi.
Posts: 646
Default

Quote:
Originally Posted by Baron Von Zeppelin View Post
That is as fair a deal as you can ask for, and I would do that.
As in I would physically have it apart and inspected.

Question still remains - how to verify it is a Series 2.
If can't verify until you have yours apart to compare, at least you would know at that time you had a verified good used Series 1 or Series 3 you could put up for resale.

Somewhere on this site there has been at least one good thread about differences and distinguishing between 8.2 posi chunks. Series ID'ing and the difference of bolt hole sizes / thread orientation.
But it might take a whole lot of creative searches to find it again - if even.
Maybe it was in Street Section , but I can't remember.

Monzaz was probably involved with it some, if you searched his post archive history you might find one or two discussions that could help.
64-65 section is pretty slim on activity, the whole forum itself is much slimmer these days.
I have my open diff out and available for comparison

  #43  
Old 01-13-2022, 08:52 PM
Baron Von Zeppelin Baron Von Zeppelin is offline
Ultimate Warrior
 
Join Date: Jul 2005
Location: North Carolina
Posts: 7,527
Default

Another thing to add in the mix of things to measure / verify -
the size of the bolt holes that secure the ring gear to the carrier.
There is Early and Late as mentioned in a previous post already.

To keep in mind, just because the seller states the rear came OUT of a 65 GTO , does not guarantee the rear was the original in that 65.. Differentials get swapped around and it could have been a 69 Differential ,,, for all anyone knows.

Ideally you want the bolt holes to be the same as your existing Early ring gear bolt holes.
To avoid any deeper modifications or buying another ring & pinion set (Later Version)

  #44  
Old 01-13-2022, 10:11 PM
John Milner's Avatar
John Milner John Milner is online now
Chief Ponti-yacker
 
Join Date: Nov 2004
Location: Oklahoma
Posts: 955
Default

There is a measurement from my open 8.2 carrier from my 71 Lemans. It had 3:08 gears on it.
Attached Thumbnails
Click image for larger version

Name:	9092AC2A-50F2-4767-863D-9500D5934695.jpg
Views:	34
Size:	53.9 KB
ID:	581846  

  #45  
Old 01-13-2022, 10:26 PM
John Milner's Avatar
John Milner John Milner is online now
Chief Ponti-yacker
 
Join Date: Nov 2004
Location: Oklahoma
Posts: 955
Default

There’s one more picture measuring from the other end.
Attached Thumbnails
Click image for larger version

Name:	ABAC0BDD-893B-4900-AAB2-9D6796E98FBB.jpg
Views:	28
Size:	38.9 KB
ID:	581850  

  #46  
Old 01-13-2022, 10:57 PM
AG's Avatar
AG AG is offline
Ultimate Warrior
 
Join Date: Feb 2000
Location: NH
Posts: 2,809
Default

I measured 1-7/8" on my 2.93-3.23 posi carrier. If you have a '65 carrier, it will have 3/8" ring gear bolts.

__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #47  
Old 01-14-2022, 08:06 AM
72pontiac's Avatar
72pontiac 72pontiac is offline
Chief Ponti-yacker
 
Join Date: Jun 2006
Location: Waterford Mi.
Posts: 646
Default

Quote:
Originally Posted by AG View Post
I measured 1-7/8" on my 2.93-3.23 posi carrier. If you have a '65 carrier, it will have 3/8" ring gear bolts.
Rather than 7/16 bolts on a later style?

  #48  
Old 01-14-2022, 09:46 AM
AG's Avatar
AG AG is offline
Ultimate Warrior
 
Join Date: Feb 2000
Location: NH
Posts: 2,809
Default

Correct, the change was sometime in 1969. The Eaton clutch style posi (3.36-4.10) comes with the 3/8" holes so if you use a 7/16" ring gear you have to drill the carrier.

__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #49  
Old 01-14-2022, 11:46 AM
72pontiac's Avatar
72pontiac 72pontiac is offline
Chief Ponti-yacker
 
Join Date: Jun 2006
Location: Waterford Mi.
Posts: 646
Default

does the bop lsd have the cone viewing windows

  #50  
Old 01-14-2022, 12:50 PM
AG's Avatar
AG AG is offline
Ultimate Warrior
 
Join Date: Feb 2000
Location: NH
Posts: 2,809
Default

What are the cone viewing windows? You can't see the cones from the outside in either of the 2 or 4 pinion posi's. You need to unbolt and separate the carrier to see the cones.

__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #51  
Old 01-14-2022, 12:53 PM
AG's Avatar
AG AG is offline
Ultimate Warrior
 
Join Date: Feb 2000
Location: NH
Posts: 2,809
Default

What are the cone viewing windows? You can't see the cones from the outside. You need to unbolt the carrier to see the cones, see post #33.

__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #52  
Old 01-14-2022, 01:04 PM
72pontiac's Avatar
72pontiac 72pontiac is offline
Chief Ponti-yacker
 
Join Date: Jun 2006
Location: Waterford Mi.
Posts: 646
Default

Ok. Another style/make has windows you can see if the cones are bottomed out this one is after the repair and the cone isn't even into the window
Attached Thumbnails
Click image for larger version

Name:	Screenshot_20220114-120622.jpg
Views:	49
Size:	42.0 KB
ID:	581876  


Last edited by 72pontiac; 01-14-2022 at 01:09 PM.
  #53  
Old 01-15-2022, 01:48 PM
72pontiac's Avatar
72pontiac 72pontiac is offline
Chief Ponti-yacker
 
Join Date: Jun 2006
Location: Waterford Mi.
Posts: 646
Default

Well I decided to buy it as he said I could have it check out and I have access to a lathe and felt comfortable I could make it good if it wasn't. Told him I wanted it but just tested positive for covid and as soon as I was over it I would come get it he said sounds great. 5 minutes ago he messaged he sold it. Oh well.

  #54  
Old 01-15-2022, 09:06 PM
Gary H's Avatar
Gary H Gary H is offline
Ultimate Warrior
 
Join Date: Feb 2002
Location: Jacksonville
Posts: 1,164
Default

I just bought an Auburn posi unit for a 8.2" BOP that will fit a 3:08 gear. Got it through Summit Racing about two weeks ago and it's already installed in a 67' GTO that has the original rear end in it.

__________________
62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs
  #55  
Old 01-15-2022, 09:52 PM
AG's Avatar
AG AG is offline
Ultimate Warrior
 
Join Date: Feb 2000
Location: NH
Posts: 2,809
Default

Quote:
Originally Posted by Gary H View Post
I just bought an Auburn posi unit for a 8.2" BOP that will fit a 3:08 gear. Got it through Summit Racing about two weeks ago and it's already installed in a 67' GTO that has the original rear end in it.
If you want to keep your current housing do this. If not, get a 12 bolt or '71-72 Olds 8.5".

__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #56  
Old 01-15-2022, 10:16 PM
AG's Avatar
AG AG is offline
Ultimate Warrior
 
Join Date: Feb 2000
Location: NH
Posts: 2,809
Default

Power Trax is a good option and easy to install. Never used one, but feedback I've seen says they act like a Detroit locker which would be fine with me. Then you don't have to change the carrier and set it up.

__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #57  
Old 01-15-2022, 10:17 PM
72pontiac's Avatar
72pontiac 72pontiac is offline
Chief Ponti-yacker
 
Join Date: Jun 2006
Location: Waterford Mi.
Posts: 646
Default

Thanks everyone for the help.

  #58  
Old 01-16-2022, 01:27 PM
tallrandyb's Avatar
tallrandyb tallrandyb is offline
Senior Member
 
Join Date: Oct 2020
Location: Orlando Florida area
Posts: 119
Default

If you really really want an Auburn posi for a 3.23 8.2 right now and you want to buy one from Sweden, these guys claim they have two:

https://www.hansenracing.se/produkt/...ffsparr-598530

That converts to US $855.

And they replied to my email inquiry and said shipping would be $100 "International Economy".

  #59  
Old 01-16-2022, 01:36 PM
72pontiac's Avatar
72pontiac 72pontiac is offline
Chief Ponti-yacker
 
Join Date: Jun 2006
Location: Waterford Mi.
Posts: 646
Default

Quote:
Originally Posted by tallrandyb View Post
If you really really want an Auburn posi for a 3.23 8.2 right now and you want to buy one from Sweden, these guys claim they have two:

https://www.hansenracing.se/produkt/...ffsparr-598530

That converts to US $855.

And they replied to my email inquiry and said shipping would be $100 "International Economy".
Actually Gary h was right summit has them accessible right now $439 I think it was.

  #60  
Old 01-16-2022, 01:59 PM
tallrandyb's Avatar
tallrandyb tallrandyb is offline
Senior Member
 
Join Date: Oct 2020
Location: Orlando Florida area
Posts: 119
Default

Quote:
Originally Posted by 72pontiac View Post
Actually Gary h was right summit has them accessible right now $439 I think it was.
Excellent! Yes it appears they are back in stock, they claim 10 available. Great!

I wonder why the product code changed or if there is a change in the internals. The Auburn I bought was a 5420114, these are showing 546099.


Last edited by tallrandyb; 01-16-2022 at 02:01 PM. Reason: product codes
Reply

Thread Tools
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

Forum Jump


All times are GMT -4. The time now is 12:39 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 

Cold Case Radiators

Cold Case Radiators is a Max Performance company that produces high end aluminum performance radiators at a price point that won't break the bank. Polished and stamped tanks. 2 rows of 1" tubes. Lifetime Warranty.

GTOG8TA.com

GTOG8TA.com is a Max Performance company that manufacturers parts for the 04-06 GTO, 08-09 G8, and 93-02 Firebird/Trans Am platforms.

Copyright © 2017