Posi Identification

I've come across what I believe is a posi from a pre '64 Buick. I did a seach but couldn't come up with a way to identify it. Is this posi a Buick? If so, what years would it fit?

 

Ford 8 inch?

 

This is definatley from a GM product, but there is no identifying numbers on the case. Any other ideas??

 

How about the ring gear? It must be 9 3/8" and have a part number on the side.

 

I'm thinking 50's or early 60's Pontiac or Olds.

 

The ring gear # 136522114-43GM25. Has 43 teeth. The pinion gear # 136522214-43 and has 14 teeth. Also has J, 65 and 4 stamped on the gear. The housing has 156 stamped on the side.

 

3.07:1 ratio.

Devon

 

Probably '63, '64, or '65. The 3.07 gear ratio wasn't available in '62 or the years prior.

 

We pulled the open one from that red '62 Invicta at Rohner's-it was a 3.07-Tim has it-

 

Really? I don't think the 3.07 is the listed in any of my '62 literature or shop manuals.

Hmm, now I'm second guessing myself :laugh: .

 

'62-'63 big car.

 

Thanks for the help!

Would a 62-63 center section be round or slightly oval?

 

Slightly oval like all the Buick removable carriers.

 

Any idea what the spline count is? '62 should have 33 splines, I think in '63 they went to 30 or 31. '64 might have been when they changed it though.

 

I know my '64 Riv. is 31 splines. I've owned it since new so at least this is a given. The car was built 12D, meaning the 4th. week of Dec. 1963.

Tom T.

 

It's got 31 splines, sounds like it's definately a 63.

BTW, it's for sale, shoot me a PM if interested.