[Chevelle-list] 12 Bolt Posi Rear

[Jim Sullivan]

Dale,  It is an inch shorter.  With all the mods for the brackets, I will 
definitely take your advice and see if I can swap it for the correct year.
Thanks for the Chevellestuff link info.
Jim


----- Original Message ----- 
From: "Dale" <396guy at lcisp.com>
To: "'The Chevelle Mailing List'" <chevelle-list at chevelles.net>
Sent: Monday, July 09, 2007 11:21 PM
Subject: Re: [Chevelle-list] 12 Bolt Posi Rear


> Casting number 3875745N shows it to be a 66 12-bolt rear.  CO is 3.31
> w/metallic brakes and Positraction.  It's 1 to 2 inches narrower than a
> 68-72 rear and should have a different spring perch arrangement; lower 
> coil
> is larger and a plate bolts it in place as opposed to it sitting on a 'top
> hat'.  Honestly, it's worth more to a 66 owner looking for a good rear end
> as they're getting harder and harder to find.  Any 68-72 Chevrolet rear
> should bolt right in.
>
> You might want to read the bottom of this page -
> http://www.chevellestuff.com/generic/axlecodes.htm
>
> Dale McIntosh
> 1966/67 Chevelle Reference CDs
> ChevelleStuff.com
>
>
> -----Original Message-----
> From: chevelle-list-bounces at chevelles.net
> [mailto:chevelle-list-bounces at chevelles.net] On Behalf Of Jim Sullivan
> Sent: Monday, July 09, 2007 9:37 PM
> To: The Chevelle Mailing List
> Subject: [Chevelle-list] 12 Bolt Posi Rear
>
> Can anyone tell me what this 12 bolt is out of and will it fit in my 69
> Chevelle??  The mountings are a little different, but measure up pretty
> close to my 10 bolt.
>
> It's 3.30 gears.
> Posi Unit    EO -  30140PMI
> Tube Stamped   C00118B
>                                  E
> Case castings     GM1           3875745N
>                                                L306   Looks like?
>
> As always, any help greatly appreciated.
> Jim
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