Rear axle ID

[avnut]

Found the rear axle ID on my 68 .Perhaps someone here can tell me what it means.When I got car in 77 it had 4.88 posi in it.I changed the gears to 4.11 a couple years later.It was very likely changed from stock as the ring gear has a spacer between the carrier and ring.I think its a series 3 carrier?
The ID is  PP  0321G1 stamped into the forward side of right tube.On the corner of center section is cast K67.

[Mike S]

 This link has good information about the codes: http://www.camaros.org/drivetrain.shtml#AxleCodes

Mike

[avnut]

This link has good information about the codes: http://www.camaros.org/drivetrain.shtml#AxleCodes

Mike

Thanks for the link Mike.Looks like my axle originally had 3.07 12 bolt with one wheel peel.Made on Mar 21 by Detroit Gear -1 st shift if I understand the chart correctly.

[lakeholme]

Scroll up a little from Mike's link to decode the casting date.
The CRG explanation is easier to read than Colvin's.

[avnut]

Scroll up a little from Mike's link to decode the casting date.
The CRG explanation is easier to read than Colvin's.

Thanks
Nov 6,67 was cast
You guys are making this too easy!

[lakeholme]

It's really not that hard. It just takes practice and a great source like CRG!
"Give a man the decode... teach him how to decode..." you get the picture!

[avnut]

It's really not that hard. It just takes practice and a great source like CRG!
"Give a man the decode... teach him how to decode..." you get the picture!

Thanks yet again!
I now know how/when built,but I wont be going back there.I may regear to 3.73 and the posi stays.Perhaps the posi was dealer installed?

[KurtS]

With that axle, I'd say it was originally an L35 with an auto.

Kurt

[avnut]

I also suspect a lower HP 396 and Auto was original.Was doing some research of the console and floor area (thanks to this site)and thats why I am guessing an auto was in there.It has a rubber cable boot in the floor under the console.The speedo cable exits the firewall on the left side of steering coluum.The cutout for the 4 spd shifter is rough and jagged,so not factory and I have a SBC cross member for trans.