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Apr 29, 2015 | 07:32 PM

66jack

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Joined: May 2006

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From: CA

Diff Question

I have owned my 66, L79 since 1974 so i know for a fact its the original 3:70 gears...my car is a Dec. 14 build date

Question:

Is it possible to determine what/which Posi Unit is in the car without disassembling it by just using the Build Date...

I hear/someone told me there are 2 different type of DANA UNITS?

I am thinking of changing Ratio's...

TIA

Apr 29, 2015 | 07:41 PM

Powershift

Race Director

Joined: Apr 2005

Posts: 11,308

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From: Bowling Green, Kentucky

Quote:

Originally Posted by 66jack

Gary Ramadei can help you. Google the name, and send him an email. He rebuilds these rears every week. He used to be on this forum, but now spends most of his time at NCRS Forum.

The answer to your question is also in the archives if you search.

Larry

Apr 29, 2015 | 08:10 PM

66jack

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From: CA

Quote:

Originally Posted by Powershift

Thanks....

I just did a search for Gary Ramadei and found writeup and how to ID the possible differences in Jackfits thread...

Apr 29, 2015 | 09:01 PM

Jackfit

Le Mans Master

Joined: Feb 2006

Posts: 5,073

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From: Maine

Quote:

Originally Posted by 66jack

Thanks....

I just did a search for Gary Ramadei and found writeup and how to ID the possible differences in Jackfits thread...

Hi , I was just going to suggest that,

Jack

You have an early eaton posi . The later ones 71-79 had better spider gears....but not as good bolts etc.

You don't have a Dana Posi

Apr 30, 2015 | 04:47 PM

JohnZ

Team Owner

Joined: Oct 2000

Posts: 38,897

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From: Washington Michigan

Quote:

Originally Posted by 66jack

Question:

Is it possible to determine what/which Posi Unit is in the car without disassembling it by just using the Build Date...

I hear/someone told me there are 2 different type of DANA UNITS?

Dana posi units were only used in '63-'64, and most of those have been converted to Eaton units as the original weak Dana units failed. '65-up all used Eaton units.

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