Late 69 Differential Code Stampings

[Jamie F.]

Most of the differential stampings I have seen start with a 1 or 2 (which I think was the shift) and end with a W (for Warren the factory that built it). My stamping has neither of these.
It just has the axle code and date of AZ 10 22 69, and a casting date of I 10 69. Trim tag date is P20.
Has anyone seen this?
I was told that some late '69 were not built at Warren and that might explain the lack of the last factory stamp letter?
Another said that there was a transition to the 70 three letter code and the stampings procedure changed?
Anyone else with a Nov '69 car that could let me know what theirs says?
Any experience in these stampings would be appreciated.
Thanks!

[Harry S.]

Re: Late 69 Differential Code Stampings

Jamie, I just picked up a 69 differential as I needed the posi. unit. The stamp is 2 AO 4 24 69 W That translates to a 3.70 rear. Hope that helps.

[Jamie F.]

Re: Late 69 Differential Code Stampings

Harry,
That's exactly my point. Your April 69 Diff has the 2 and the W, mine doesn't. But is was made 6 months later. Just wondering if mine is correct or not without those two characters.
Thanks for the input.

[Harry S.]

Re: Late 69 Differential Code Stampings

If it was 6 months later I believe the differential is for the 1970 model year. Was that stamp pattern different?

[Jamie F.]

Re: Late 69 Differential Code Stampings

'70 codes were 3 letters. Mine is still a '69 code or AZ. I would just like to know if the absence of the 1 and the W is a normal thing or not???
Could the rear have been made somewhere else than Warren?
What other locations built Diffs?

[Harry S.]

Re: Late 69 Differential Code Stampings

The other plant codes are G B and K

I just have to ask, is there a C infront of the AZ

[Jamie F.]

Re: Late 69 Differential Code Stampings

Harry,
No C.
Just AZ 10 22 69. Which is October 22 1969.
Which c[FONT='Calibri','sans-serif']oincidentally[/FONT] most of the parts on my car are that date for some reason; Block, Heads, Distributor, Exhaust manifolds, ALL J22.
Strange.

[Lawrence M.]

Re: Late 69 Differential Code Stampings

Jamie, my old '69 now long gone to a new owner had a Q 15 body build date. The diff code was 1C AN 12 3 69 W. The W stamping was very faint. I have the casting code written down somewhere, but I can't find that piece of paper right now. Hope this helps you.

Larry

[Tom M.]

Re: Late 69 Differential Code Stampings

here is my late 69

[Jamie F.]

Re: Late 69 Differential Code Stampings

Tom,
Do you know the casting date of your diff case?

[Harry S.]

Re: Late 69 Differential Code Stampings

Tom's looks like CFA to me.

[Jamie F.]

Re: Late 69 Differential Code Stampings

Yes Harry that's a '70 code which was used on late '69 according to the Guide and other info.
My Diff is about a month later, but doesn't carry the "C" or the "W". Just trying to understand why.
I figure someone else must have come across this too. My best guess is that it was made a a different plant than W, Warren???

[Gary R.]

Re: Late 69 Differential Code Stampings

I have a I 19 9 cast dated Diff with 2CAM121769W stamped in it. It has the original gears, dated 6/69. This came out of a late 69 many years ago. I've had it on my shelf for 25 years.

[Jamie F.]

Re: Late 69 Differential Code Stampings

Gary, interesting that you case was cast just 9 days after mine, but was assembled almost 2 months after mine. It would be interesting to see when Tom's was cast vs. his assembly date.

[Tom M.]

Re: Late 69 Differential Code Stampings

Tom,
Do you know the casting date of your diff case?

I will check