I just got a number of the right front side of the housing it says GM 36 what is that? I do believe that all auto 80Zs Came with 3.42posi am I right?

8OZGUY, YOU NEED TO LOOK FOR NUMBERS "STAMPED" INTO THE FRONT OF THE PASSENGER SIDE AXLE TUBE. IF YOU HAVE A 3.42 POSI THE FIRST 3 DIGITS WILL BE "2PY" IF ITS A NON POSI 3.42 THEN THE FIRST 3 DIGITS WILL BE "2PE" I BELIEVE THIS TO BE CORRECT. SOMEONE HELP ME IF I'M WRONG. HOPE THIS HELPS...

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1970 Z-28,1970 SS396 L78,1972 SS396,1973 RS Z-28

1980 DIFFERENTIAL CODES
(stamped on front of passenger side axle tube)

2.56 Posi 2PT Non-posi 2PH
2.73 Posi 2PU Non-posi 2PA
3.08 Posi 2PW Non-posi 2PC
3.42 Posi 2PY Non-posi 2PE

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72 RS/SS- In works being restored to original
location: Eglin AFB, Fl

[This message has been edited by wright (edited 06-17-2000).]

[This message has been edited by wright (edited 06-17-2000).]