Author Topic: Eaton Posi Date  (Read 2331 times)

HawkX66

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Re: Eaton Posi Date
« Reply #15 on: April 06, 2017, 05:15:18 PM »
What's assembly date of posi

Original poster was asking about the posi unit stampings...  NOT the gear stampings..
Ah. If that's the case, I couldn't tell you. I don't think it was stamped, otherwise I would have taken a pic of it. I could have missed it though.
 Now that I'm reading it a little closer, my guess is he was asking me for the date the whole posi rear end was assembled. If so... 8/20/69

Dave
69 SS396 X66 L34 M21 BS
Z23 711 U17 Hugger Orange
Semper Fi! USMC 93-02

hihorse

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Re: Eaton Posi Date
« Reply #16 on: April 21, 2018, 02:35:39 PM »
Dave,
Stamping on right tube is assembly of Diff. Was looking for assembly date of posi carrier which is located on flange that ring gear is bolted to.

bcmiller

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Re: Eaton Posi Date
« Reply #17 on: April 21, 2018, 05:48:24 PM »
I am not sure they all were stamped with a date.
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

bertfam

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Re: Eaton Posi Date
« Reply #18 on: April 21, 2018, 06:08:23 PM »
Here's a 2 series and a 3 series posi carrier I have. E 10 8, and J 7 4 (or J 7 A, hard to tell).

Ed
Ed "Bert" Bertrand
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bcmiller

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Re: Eaton Posi Date
« Reply #19 on: April 21, 2018, 07:27:09 PM »
The only one I have easy access to here is a 3 series stamped F 2 J

I had a 4 series a while back that was just stamped 8

Honestly unless you have a COPO car, who cares about the date? Itís not going to be judged or checked unless it needs to be verified as a 4 series with correct COPO internals, which are different than regular posi internals. Now having correctly dated gears (and housing) IS important in my mind. Just my 2 cents. 

Itís ok to be mindful of the numbers, just donít fall over the edge to OCD.  :)
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

bcmiller

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Re: Eaton Posi Date
« Reply #20 on: April 21, 2018, 08:32:39 PM »
And I just chatted with a person that deals with rear end internals every day for his business.

With the new Eaton style posi units being sold today, the internals and cases are a lot stronger than the originals.  Prices on the new ones are typically the same or less than an old rebuilt unit.  Just FYI.
« Last Edit: April 21, 2018, 08:56:50 PM by bcmiller »
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

bertfam

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Re: Eaton Posi Date
« Reply #21 on: April 21, 2018, 11:36:29 PM »
That E 10 8 posi I posted above could be an E 10 B. Hard to tell.

Ed
Ed "Bert" Bertrand
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hihorse

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Re: Eaton Posi Date
« Reply #22 on: April 25, 2018, 05:26:09 PM »
The only one I have easy access to here is a 3 series stamped F 2 J

I had a 4 series a while back that was just stamped 8

Honestly unless you have a COPO car, who cares about the date? Itís not going to be judged or checked unless it needs to be verified as a 4 series with correct COPO internals, which are different than regular posi internals. Now having correctly dated gears (and housing) IS important in my mind. Just my 2 cents. 

Itís ok to be mindful of the numbers, just donít fall over the edge to OCD.  :)
All assembly dates including one Eaton stamped on the posi carriers is important to me whether car is being judged or not.

bcmiller

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Re: Eaton Posi Date
« Reply #23 on: April 25, 2018, 06:05:15 PM »
And thatís your choice. Whatever...

I mean either itís either original to the car or not.

Mine isnít - because it was originally a 3.73 open rear end.
« Last Edit: April 25, 2018, 06:49:58 PM by bcmiller »
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016