Rearaxle #’s: 254333 on drivers side, CM32 or GM32 on pass.side (upside down, facing forward)

Can anyone help decode this?
(Looks like it’s diffed)

Lars, Norway

CM = 3.42 POSI, the numbers that are there im not sure about, you should have another number, i think

------------------
72 RS/SS- restoration nearly complete
location: Eglin AFB, Fl

I think you have gotten the numbers from the center section of the rear you need to get the number from the axle tube pass. side.

I think you’re right, and here’s what I found:
2PS G127 2


------------------
Lars, Norway
-------------------
70.5 w/400SB, TH350, blue monster, black stripes,
lookin’ gooood!!

I find PS and 2PS to be 2.41 posi rears. My Camaro listings all show PS, but I think Firebird has the 2PS code for the same rear some years.

I'm not sure about earlier years, but the 2PS code indicates that it is also a posi unit. Is that correct for the 1970 year?

John
79Z28

Can anyone give me the exact definition of the term positraction. What it entails; how it works, pro’s and con’s etc.
-------
Lars

Try this web site it will explain all or most codes http://www.geocities.com:0080/MotorCity/Downs/1980